15981072 has 40 divisors (see below), whose sum is σ = 41497344. Its totient is φ = 5299584.

The previous prime is 15981047. The next prime is 15981101. The reversal of 15981072 is 27018951.

15981072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9958 + ... + 11450.

Almost surely, 2^15981072 is an apocalyptic number.

15981072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

15981072 is an abundant number, since it is smaller than the sum of its proper divisors (25516272).

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

15981072 is a wasteful number, since it uses less digits than its factorization.

15981072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1727 (or 1721 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 15981072 is about 3997.6332998413. The cubic root of 15981072 is about 251.8848049965.

The spelling of 15981072 in words is "fifteen million, nine hundred eighty-one thousand, seventy-two".