28431608 has 16 divisors (see below), whose sum is σ = 53551680. Its totient is φ = 14151168.

The previous prime is 28431589. The next prime is 28431647. The reversal of 28431608 is 80613482.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6185 + ... + 9752.

It is an arithmetic number, because the mean of its divisors is an integer number (3346980).

Almost surely, 2^28431608 is an apocalyptic number.

It is an amenable number.

28431608 is a deficient number, since it is larger than the sum of its proper divisors (25120072).

28431608 is a wasteful number, since it uses less digits than its factorization.

28431608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16166 (or 16162 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 28431608 is about 5332.1297808662. The cubic root of 28431608 is about 305.2112054984.

The spelling of 28431608 in words is "twenty-eight million, four hundred thirty-one thousand, six hundred eight".