15820916 has 12 divisors (see below), whose sum is σ = 28362180. Its totient is φ = 7717440.

The previous prime is 15820877. The next prime is 15820919. The reversal of 15820916 is 61902851.

15820916 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1833316 + 13987600 = 1354^2 + 3740^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15820919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48071 + ... + 48398.

It is an arithmetic number, because the mean of its divisors is an integer number (2363515).

Almost surely, 2^15820916 is an apocalyptic number.

It is an amenable number.

15820916 is a deficient number, since it is larger than the sum of its proper divisors (12541264).

15820916 is a wasteful number, since it uses less digits than its factorization.

15820916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96514 (or 96512 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 15820916 is about 3977.5515081517. The cubic root of 15820916 is about 251.0405483610.

The spelling of 15820916 in words is "fifteen million, eight hundred twenty thousand, nine hundred sixteen".