Search a number
-
+
30238560 = 25325112383
BaseRepresentation
bin111001101011…
…0011101100000
32002220021111200
41303112131200
530220113220
63000041200
7515011032
oct163263540
962807450
1030238560
1116083750
12a163200
136359751
144031c52
1529c4890
hex1cd6760

30238560 has 288 divisors, whose sum is σ = 118879488. Its totient is φ = 6927360.

The previous prime is 30238541. The next prime is 30238591. The reversal of 30238560 is 6583203.

It is a tau number, because it is divible by the number of its divisors (288).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 364279 + ... + 364361.

It is an arithmetic number, because the mean of its divisors is an integer number (412776).

Almost surely, 230238560 is an apocalyptic number.

30238560 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30238560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59439744).

30238560 is an abundant number, since it is smaller than the sum of its proper divisors (88640928).

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

30238560 is a wasteful number, since it uses less digits than its factorization.

30238560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 30238560 is about 5498.9599016541. The cubic root of 30238560 is about 311.5447008001.

The spelling of 30238560 in words is "thirty million, two hundred thirty-eight thousand, five hundred sixty".