15981896 has 32 divisors (see below), whose sum is σ = 35048640. Its totient is φ = 6689088.

The previous prime is 15981893. The next prime is 15981947. The reversal of 15981896 is 69818951.

It is a self number, because there is not a number n which added to its sum of digits gives 15981896.

It is not an unprimeable number, because it can be changed into a prime (15981893) 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, 911 + ... + 5726.

It is an arithmetic number, because the mean of its divisors is an integer number (1095270).

Almost surely, 2^15981896 is an apocalyptic number.

It is an amenable number.

15981896 is an abundant number, since it is smaller than the sum of its proper divisors (19066744).

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

15981896 is a wasteful number, since it uses less digits than its factorization.

15981896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6693 (or 6689 counting only the distinct ones).

The product of its digits is 155520, while the sum is 47.

The square root of 15981896 is about 3997.7363594915. The cubic root of 15981896 is about 251.8891340660.

The spelling of 15981896 in words is "fifteen million, nine hundred eighty-one thousand, eight hundred ninety-six".