28658632 has 32 divisors (see below), whose sum is σ = 56263680. Its totient is φ = 13668480.

The previous prime is 28658599. The next prime is 28658633. The reversal of 28658632 is 23685682.

It is a super-2 number, since 2×28658632² = 1642634376222848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28658633) 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, 17313 + ... + 18895.

It is an arithmetic number, because the mean of its divisors is an integer number (1758240).

Almost surely, 2^28658632 is an apocalyptic number.

It is an amenable number.

28658632 is a deficient number, since it is larger than the sum of its proper divisors (27605048).

28658632 is a wasteful number, since it uses less digits than its factorization.

28658632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1693 (or 1689 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

The square root of 28658632 is about 5353.3757574077. The cubic root of 28658632 is about 306.0214147657.

The spelling of 28658632 in words is "twenty-eight million, six hundred fifty-eight thousand, six hundred thirty-two".