15972730 has 16 divisors (see below), whose sum is σ = 30264480. Its totient is φ = 6052752.

The previous prime is 15972713. The next prime is 15972731. The reversal of 15972730 is 3727951.

It is not an unprimeable number, because it can be changed into a prime (15972731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41844 + ... + 42223.

It is an arithmetic number, because the mean of its divisors is an integer number (1891530).

Almost surely, 2^15972730 is an apocalyptic number.

15972730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15972730 is a deficient number, since it is larger than the sum of its proper divisors (14291750).

15972730 is a wasteful number, since it uses less digits than its factorization.

15972730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84093.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 15972730 is about 3996.5897963139. The cubic root of 15972730 is about 251.8409700406.

The spelling of 15972730 in words is "fifteen million, nine hundred seventy-two thousand, seven hundred thirty".