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15189030 = 2325712377
BaseRepresentation
bin111001111100…
…010000100110
31001120200102200
4321330100212
512342022110
61301315330
7243050613
oct71742046
931520380
1015189030
11863481a
125105b46
1331ba6bc
14203550a
1515006c0
hexe7c426

15189030 has 48 divisors (see below), whose sum is σ = 40064544. Its totient is φ = 3991680.

The previous prime is 15189023. The next prime is 15189059. The reversal of 15189030 is 3098151.

15189030 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 15188985 and 15189003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5202 + ... + 7578.

It is an arithmetic number, because the mean of its divisors is an integer number (834678).

Almost surely, 215189030 is an apocalyptic number.

15189030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 15189030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20032272).

15189030 is an abundant number, since it is smaller than the sum of its proper divisors (24875514).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15189030 is a wasteful number, since it uses less digits than its factorization.

15189030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2461 (or 2458 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 15189030 is about 3897.3106111779. The cubic root of 15189030 is about 247.6528593528.

It can be divided in two parts, 1 and 5189030, that added together give a triangular number (5189031 = T3221).

The spelling of 15189030 in words is "fifteen million, one hundred eighty-nine thousand, thirty".

Divisors: 1 2 3 5 6 9 10 15 18 30 45 71 90 142 213 355 426 639 710 1065 1278 2130 2377 3195 4754 6390 7131 11885 14262 21393 23770 35655 42786 71310 106965 168767 213930 337534 506301 843835 1012602 1518903 1687670 2531505 3037806 5063010 7594515 15189030