15138990 has 24 divisors (see below), whose sum is σ = 39361608. Its totient is φ = 4037040.

The previous prime is 15138971. The next prime is 15139001. The reversal of 15138990 is 9983151.

It is a happy number.

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 (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84016 + ... + 84195.

It is an arithmetic number, because the mean of its divisors is an integer number (1640067).

Almost surely, 2^15138990 is an apocalyptic number.

15138990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15138990 is an abundant number, since it is smaller than the sum of its proper divisors (24222618).

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

15138990 is a wasteful number, since it uses less digits than its factorization.

15138990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168224 (or 168221 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 15138990 is about 3890.8855033270. The cubic root of 15138990 is about 247.3805974405.

The spelling of 15138990 in words is "fifteen million, one hundred thirty-eight thousand, nine hundred ninety".