15972416 has 28 divisors (see below), whose sum is σ = 32016192. Its totient is φ = 7905408.

The previous prime is 15972391. The next prime is 15972449. The reversal of 15972416 is 61427951.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5381 + ... + 7803.

Almost surely, 2^15972416 is an apocalyptic number.

15972416 is a gapful number since it is divisible by the number (16) 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 15972416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16008096).

15972416 is an abundant number, since it is smaller than the sum of its proper divisors (16043776).

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

15972416 is a wasteful number, since it uses less digits than its factorization.

15972416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2538 (or 2528 counting only the distinct ones).

The product of its digits is 15120, while the sum is 35.

The square root of 15972416 is about 3996.5505126296. The cubic root of 15972416 is about 251.8393197575.

The spelling of 15972416 in words is "fifteen million, nine hundred seventy-two thousand, four hundred sixteen".