28401922 has 16 divisors (see below), whose sum is σ = 45417600. Its totient is φ = 13281840.

The previous prime is 28401911. The next prime is 28401931. The reversal of 28401922 is 22910482.

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, 1729 + ... + 7732.

It is an arithmetic number, because the mean of its divisors is an integer number (2838600).

Almost surely, 2^28401922 is an apocalyptic number.

28401922 is a deficient number, since it is larger than the sum of its proper divisors (17015678).

28401922 is a wasteful number, since it uses less digits than its factorization.

28401922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9561.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 28401922 is about 5329.3453631755. The cubic root of 28401922 is about 305.1049428360.

The spelling of 28401922 in words is "twenty-eight million, four hundred one thousand, nine hundred twenty-two".