15000990 has 32 divisors (see below), whose sum is σ = 36771840. Its totient is φ = 3914784.

The previous prime is 15000977. The next prime is 15001001. The reversal of 15000990 is 9900051.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 15000990.

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, 3910 + ... + 6729.

It is an arithmetic number, because the mean of its divisors is an integer number (1149120).

Almost surely, 2^15000990 is an apocalyptic number.

15000990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15000990 is an abundant number, since it is smaller than the sum of its proper divisors (21770850).

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

15000990 is a wasteful number, since it uses less digits than its factorization.

15000990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10696.

The product of its (nonzero) digits is 405, while the sum is 24.

The square root of 15000990 is about 3873.1111525491. Note that the first 4 decimals coincide. The cubic root of 15000990 is about 246.6266329803.

The spelling of 15000990 in words is "fifteen million, nine hundred ninety", and thus it is an aban number.