13161990 has 16 divisors (see below), whose sum is σ = 31588848. Its totient is φ = 3509856.

The previous prime is 13161983. The next prime is 13161991. The reversal of 13161990 is 9916131.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 438733 = 13161990 / (1 + 3 + 1 + 6 + 1 + 9 + 9 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13161991) 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, 219337 + ... + 219396.

It is an arithmetic number, because the mean of its divisors is an integer number (1974303).

Almost surely, 2^13161990 is an apocalyptic number.

13161990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13161990 is an abundant number, since it is smaller than the sum of its proper divisors (18426858).

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

13161990 is a wasteful number, since it uses less digits than its factorization.

13161990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438743.

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

The square root of 13161990 is about 3627.9456997039. The cubic root of 13161990 is about 236.1060879926.

The spelling of 13161990 in words is "thirteen million, one hundred sixty-one thousand, nine hundred ninety".