28900918 has 8 divisors (see below), whose sum is σ = 45901512. Its totient is φ = 13600416.

The previous prime is 28900913. The next prime is 28900939. The reversal of 28900918 is 81900982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×28900918² = 1670526122485448, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28900913) 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, 424980 + ... + 425047.

It is an arithmetic number, because the mean of its divisors is an integer number (5737689).

Almost surely, 2^28900918 is an apocalyptic number.

28900918 is a deficient number, since it is larger than the sum of its proper divisors (17000594).

28900918 is a wasteful number, since it uses less digits than its factorization.

28900918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850046.

The product of its (nonzero) digits is 10368, while the sum is 37.

The square root of 28900918 is about 5375.9574031051. The cubic root of 28900918 is about 306.8813852798.

The spelling of 28900918 in words is "twenty-eight million, nine hundred thousand, nine hundred eighteen".