28938922 has 16 divisors (see below), whose sum is σ = 45412992. Its totient is φ = 13804560.

The previous prime is 28938911. The next prime is 28938937. The reversal of 28938922 is 22983982.

It is a super-2 number, since 2×28938922² = 1674922413044168, 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 7 ways as a sum of consecutive naturals, for example, 28528 + ... + 29524.

It is an arithmetic number, because the mean of its divisors is an integer number (2838312).

Almost surely, 2^28938922 is an apocalyptic number.

28938922 is a deficient number, since it is larger than the sum of its proper divisors (16474070).

28938922 is a wasteful number, since it uses less digits than its factorization.

28938922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1653.

The product of its digits is 124416, while the sum is 43.

The square root of 28938922 is about 5379.4908681027. The cubic root of 28938922 is about 307.0158401996.

The spelling of 28938922 in words is "twenty-eight million, nine hundred thirty-eight thousand, nine hundred twenty-two".