13155990 has 16 divisors (see below), whose sum is σ = 31574448. Its totient is φ = 3508256.

The previous prime is 13155959. The next prime is 13156001. The reversal of 13155990 is 9955131.

It is a Curzon number.

It is a congruent number.

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, 219237 + ... + 219296.

It is an arithmetic number, because the mean of its divisors is an integer number (1973403).

Almost surely, 2^13155990 is an apocalyptic number.

13155990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13155990 is an abundant number, since it is smaller than the sum of its proper divisors (18418458).

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

13155990 is a wasteful number, since it uses less digits than its factorization.

13155990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438543.

The product of its (nonzero) digits is 6075, while the sum is 33.

The square root of 13155990 is about 3627.1186911928. The cubic root of 13155990 is about 236.0702055806.

The spelling of 13155990 in words is "thirteen million, one hundred fifty-five thousand, nine hundred ninety".