28915922 has 32 divisors (see below), whose sum is σ = 52358400. Its totient is φ = 11708928.

The previous prime is 28915919. The next prime is 28915933. The reversal of 28915922 is 22951982.

It is a super-2 number, since 2×28915922² = 1672261090220168, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28154 + ... + 29162.

It is an arithmetic number, because the mean of its divisors is an integer number (1636200).

Almost surely, 2^28915922 is an apocalyptic number.

28915922 is a deficient number, since it is larger than the sum of its proper divisors (23442478).

28915922 is a wasteful number, since it uses less digits than its factorization.

28915922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130.

The product of its digits is 25920, while the sum is 38.

The square root of 28915922 is about 5377.3526944027. The cubic root of 28915922 is about 306.9344822290.

The spelling of 28915922 in words is "twenty-eight million, nine hundred fifteen thousand, nine hundred twenty-two".