28617868 has 12 divisors (see below), whose sum is σ = 53027352. Its totient is φ = 13467200.

The previous prime is 28617863. The next prime is 28617881. The reversal of 28617868 is 86871682.

It is not an unprimeable number, because it can be changed into a prime (28617863) 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, 210358 + ... + 210493.

It is an arithmetic number, because the mean of its divisors is an integer number (4418946).

Almost surely, 2^28617868 is an apocalyptic number.

It is an amenable number.

28617868 is a deficient number, since it is larger than the sum of its proper divisors (24409484).

28617868 is a wasteful number, since it uses less digits than its factorization.

28617868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420872 (or 420870 counting only the distinct ones).

The product of its digits is 258048, while the sum is 46.

The square root of 28617868 is about 5349.5670852883. The cubic root of 28617868 is about 305.8762510994.

The spelling of 28617868 in words is "twenty-eight million, six hundred seventeen thousand, eight hundred sixty-eight".