28617908 has 24 divisors (see below), whose sum is σ = 55332480. Its totient is φ = 12841920.

The previous prime is 28617907. The next prime is 28617917. The reversal of 28617908 is 80971682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28617907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 641 + ... + 7592.

It is an arithmetic number, because the mean of its divisors is an integer number (2305520).

Almost surely, 2^28617908 is an apocalyptic number.

It is an amenable number.

28617908 is a deficient number, since it is larger than the sum of its proper divisors (26714572).

28617908 is a wasteful number, since it uses less digits than its factorization.

28617908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8327 (or 8325 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 28617908 is about 5349.5708239073. The cubic root of 28617908 is about 305.8763936100.

The spelling of 28617908 in words is "twenty-eight million, six hundred seventeen thousand, nine hundred eight".