28630680 has 64 divisors (see below), whose sum is σ = 92504160. Its totient is φ = 7047168.

The previous prime is 28630649. The next prime is 28630681. The reversal of 28630680 is 8603682.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28630681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7617 + ... + 10736.

Almost surely, 2^28630680 is an apocalyptic number.

28630680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28630680 is an abundant number, since it is smaller than the sum of its proper divisors (63873480).

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

28630680 is a wasteful number, since it uses less digits than its factorization.

28630680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18380 (or 18376 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 28630680 is about 5350.7644313687. The cubic root of 28630680 is about 305.9218904398.

The spelling of 28630680 in words is "twenty-eight million, six hundred thirty thousand, six hundred eighty".