16131990 has 32 divisors (see below), whose sum is σ = 44248320. Its totient is φ = 3687264.

The previous prime is 16131989. The next prime is 16132019. The reversal of 16131990 is 9913161.

It is a super-2 number, since 2×16131990² = 520482202720200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent 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, 38200 + ... + 38619.

It is an arithmetic number, because the mean of its divisors is an integer number (1382760).

Almost surely, 2^16131990 is an apocalyptic number.

16131990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16131990 is an abundant number, since it is smaller than the sum of its proper divisors (28116330).

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

16131990 is a wasteful number, since it uses less digits than its factorization.

16131990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76836.

The product of its (nonzero) digits is 1458, while the sum is 30.

The square root of 16131990 is about 4016.4648635336. The cubic root of 16131990 is about 252.6752174023.

The spelling of 16131990 in words is "sixteen million, one hundred thirty-one thousand, nine hundred ninety".