28630665 has 40 divisors (see below), whose sum is σ = 58660800. Its totient is φ = 13087008.

The previous prime is 28630649. The next prime is 28630681. The reversal of 28630665 is 56603682.

It is an interprime number because it is at equal distance from previous prime (28630649) and next prime (28630681).

It is not a de Polignac number, because 28630665 - 2⁴ = 28630649 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2215 + ... + 7884.

It is an arithmetic number, because the mean of its divisors is an integer number (1466520).

Almost surely, 2^28630665 is an apocalyptic number.

It is an amenable number.

28630665 is an abundant number, since it is smaller than the sum of its proper divisors (30030135).

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

28630665 is a wasteful number, since it uses less digits than its factorization.

28630665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10123 (or 10114 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 28630665 is about 5350.7630296996. The cubic root of 28630665 is about 305.9218370143.

The spelling of 28630665 in words is "twenty-eight million, six hundred thirty thousand, six hundred sixty-five".