15972140 has 24 divisors (see below), whose sum is σ = 33877872. Its totient is φ = 6324800.

The previous prime is 15972119. The next prime is 15972149. The reversal of 15972140 is 4127951.

It is not an unprimeable number, because it can be changed into a prime (15972149) 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, 1934 + ... + 5973.

It is an arithmetic number, because the mean of its divisors is an integer number (1411578).

Almost surely, 2^15972140 is an apocalyptic number.

15972140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15972140 is an abundant number, since it is smaller than the sum of its proper divisors (17905732).

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

15972140 is a wasteful number, since it uses less digits than its factorization.

15972140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8017 (or 8015 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 15972140 is about 3996.5159827029. The cubic root of 15972140 is about 251.8378691722.

The spelling of 15972140 in words is "fifteen million, nine hundred seventy-two thousand, one hundred forty".