28871624 has 32 divisors (see below), whose sum is σ = 56877120. Its totient is φ = 13713216.

The previous prime is 28871611. The next prime is 28871651. The reversal of 28871624 is 42617882.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

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, 31379 + ... + 32285.

It is an arithmetic number, because the mean of its divisors is an integer number (1777410).

Almost surely, 2^28871624 is an apocalyptic number.

It is an amenable number.

28871624 is a deficient number, since it is larger than the sum of its proper divisors (28005496).

28871624 is a wasteful number, since it uses less digits than its factorization.

28871624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1109 (or 1105 counting only the distinct ones).

The product of its digits is 43008, while the sum is 38.

The square root of 28871624 is about 5373.2321743993. The cubic root of 28871624 is about 306.7776651331. Note that the first 3 decimals are identical.

The spelling of 28871624 in words is "twenty-eight million, eight hundred seventy-one thousand, six hundred twenty-four".