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15030972 = 22321137957
BaseRepresentation
bin111001010101…
…101010111100
31001021122121200
4321111222330
512321442342
61254055500
7241522035
oct71255274
931248550
1015030972
118536aa0
12504a590
133163788
141dd3a8c
1514bd94c
hexe55abc

15030972 has 36 divisors (see below), whose sum is σ = 41450136. Its totient is φ = 4554720.

The previous prime is 15030947. The next prime is 15030973. The reversal of 15030972 is 27903051.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15030973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18583 + ... + 19374.

Almost surely, 215030972 is an apocalyptic number.

15030972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15030972 is an abundant number, since it is smaller than the sum of its proper divisors (26419164).

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

15030972 is a wasteful number, since it uses less digits than its factorization.

15030972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37978 (or 37973 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 15030972 is about 3876.9797523330. The cubic root of 15030972 is about 246.7908318961.

The spelling of 15030972 in words is "fifteen million, thirty thousand, nine hundred seventy-two".

Divisors: 1 2 3 4 6 9 11 12 18 22 33 36 44 66 99 132 198 396 37957 75914 113871 151828 227742 341613 417527 455484 683226 835054 1252581 1366452 1670108 2505162 3757743 5010324 7515486 15030972