16131890 has 16 divisors (see below), whose sum is σ = 29155032. Its totient is φ = 6426624.

The previous prime is 16131883. The next prime is 16131937. The reversal of 16131890 is 9813161.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15594601 + 537289 = 3949^2 + 733^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 569 + ... + 5708.

Almost surely, 2^16131890 is an apocalyptic number.

16131890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16131890 is a deficient number, since it is larger than the sum of its proper divisors (13023142).

16131890 is a wasteful number, since it uses less digits than its factorization.

16131890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6541.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 16131890 is about 4016.4524147561. The cubic root of 16131890 is about 252.6746953015.

The spelling of 16131890 in words is "sixteen million, one hundred thirty-one thousand, eight hundred ninety".