28307608 has 16 divisors (see below), whose sum is σ = 60659280. Its totient is φ = 12131808.

The previous prime is 28307569. The next prime is 28307611. The reversal of 28307608 is 80670382.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252691 + ... + 252802.

It is an arithmetic number, because the mean of its divisors is an integer number (3791205).

Almost surely, 2^28307608 is an apocalyptic number.

28307608 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28307608 is an abundant number, since it is smaller than the sum of its proper divisors (32351672).

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

28307608 is a wasteful number, since it uses less digits than its factorization.

28307608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505506 (or 505502 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 28307608 is about 5320.4894511689. The cubic root of 28307608 is about 304.7668486022.

The spelling of 28307608 in words is "twenty-eight million, three hundred seven thousand, six hundred eight".