28637552 has 20 divisors (see below), whose sum is σ = 57276096. Its totient is φ = 13856640.

The previous prime is 28637551. The next prime is 28637561. The reversal of 28637552 is 25573682.

28637552 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28637551) 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, 28373 + ... + 29364.

Almost surely, 2^28637552 is an apocalyptic number.

It is an amenable number.

28637552 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28637552 is a wasteful number, since it uses less digits than its factorization.

28637552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57776 (or 57770 counting only the distinct ones).

The product of its digits is 100800, while the sum is 38.

The square root of 28637552 is about 5351.4065440779. The cubic root of 28637552 is about 305.9463645011.

The spelling of 28637552 in words is "twenty-eight million, six hundred thirty-seven thousand, five hundred fifty-two".