15996890 has 32 divisors (see below), whose sum is σ = 35441280. Its totient is φ = 5062464.

The previous prime is 15996889. The next prime is 15996923. The reversal of 15996890 is 9869951.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7880 + ... + 9699.

It is an arithmetic number, because the mean of its divisors is an integer number (1107540).

Almost surely, 2^15996890 is an apocalyptic number.

15996890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15996890 is an abundant number, since it is smaller than the sum of its proper divisors (19444390).

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

15996890 is a wasteful number, since it uses less digits than its factorization.

15996890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17606.

The product of its (nonzero) digits is 174960, while the sum is 47.

The square root of 15996890 is about 3999.6112311073. The cubic root of 15996890 is about 251.9678824441.

The spelling of 15996890 in words is "fifteen million, nine hundred ninety-six thousand, eight hundred ninety".