15315890 has 16 divisors (see below), whose sum is σ = 28156032. Its totient is φ = 5995824.

The previous prime is 15315889. The next prime is 15315913. The reversal of 15315890 is 9851351.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15824 + ... + 16763.

It is an arithmetic number, because the mean of its divisors is an integer number (1759752).

Almost surely, 2^15315890 is an apocalyptic number.

15315890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15315890 is a deficient number, since it is larger than the sum of its proper divisors (12840142).

15315890 is a wasteful number, since it uses less digits than its factorization.

15315890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32641.

The product of its (nonzero) digits is 5400, while the sum is 32.

The square root of 15315890 is about 3913.5520949644. The cubic root of 15315890 is about 248.3404208999.

The spelling of 15315890 in words is "fifteen million, three hundred fifteen thousand, eight hundred ninety".