15129730 has 64 divisors (see below), whose sum is σ = 34732800. Its totient is φ = 4704000.

The previous prime is 15129701. The next prime is 15129731. The reversal of 15129730 is 3792151.

15129730 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15129731) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37530 + ... + 37930.

It is an arithmetic number, because the mean of its divisors is an integer number (542700).

Almost surely, 2^15129730 is an apocalyptic number.

15129730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15129730 is an abundant number, since it is smaller than the sum of its proper divisors (19603070).

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

15129730 is a wasteful number, since it uses less digits than its factorization.

15129730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 15129730 is about 3889.6953608220. The cubic root of 15129730 is about 247.3301490829.

The spelling of 15129730 in words is "fifteen million, one hundred twenty-nine thousand, seven hundred thirty".