28807632 has 60 divisors (see below), whose sum is σ = 92141920. Its totient is φ = 8230464.

The previous prime is 28807631. The next prime is 28807637. The reversal of 28807632 is 23670882.

It is a happy number.

It is a super-2 number, since 2×28807632² = 1659759322894848, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28807631) 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 11 ways as a sum of consecutive naturals, for example, 13282 + ... + 15297.

Almost surely, 2^28807632 is an apocalyptic number.

It is an amenable number.

28807632 is an abundant number, since it is smaller than the sum of its proper divisors (63334288).

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

28807632 is a wasteful number, since it uses less digits than its factorization.

28807632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28600 (or 28591 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 28807632 is about 5367.2741685142. The cubic root of 28807632 is about 306.5508468326.

The spelling of 28807632 in words is "twenty-eight million, eight hundred seven thousand, six hundred thirty-two".