28617628 has 24 divisors (see below), whose sum is σ = 54078752. Its totient is φ = 13172544.

The previous prime is 28617583. The next prime is 28617649. The reversal of 28617628 is 82671682.

It is a congruent number.

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, 37426 + ... + 38182.

Almost surely, 2^28617628 is an apocalyptic number.

It is an amenable number.

28617628 is a deficient number, since it is larger than the sum of its proper divisors (25461124).

28617628 is a wasteful number, since it uses less digits than its factorization.

28617628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1501 (or 1499 counting only the distinct ones).

The product of its digits is 64512, while the sum is 40.

The square root of 28617628 is about 5349.5446535196. The cubic root of 28617628 is about 305.8753960333.

The spelling of 28617628 in words is "twenty-eight million, six hundred seventeen thousand, six hundred twenty-eight".