15990764 has 12 divisors (see below), whose sum is σ = 28163184. Its totient is φ = 7944144.

The previous prime is 15990739. The next prime is 15990769. The reversal of 15990764 is 46709951.

15990764 = T₁₄₉ + T₁₅₀ + ... + T₄₆₂.

It is not an unprimeable number, because it can be changed into a prime (15990769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12104 + ... + 13359.

It is an arithmetic number, because the mean of its divisors is an integer number (2346932).

Almost surely, 2^15990764 is an apocalyptic number.

It is an amenable number.

15990764 is a deficient number, since it is larger than the sum of its proper divisors (12172420).

15990764 is a wasteful number, since it uses less digits than its factorization.

15990764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25624 (or 25622 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 41.

The square root of 15990764 is about 3998.8453333431. The cubic root of 15990764 is about 251.9357146847.

The spelling of 15990764 in words is "fifteen million, nine hundred ninety thousand, seven hundred sixty-four".