28308888 has 48 divisors (see below), whose sum is σ = 76915800. Its totient is φ = 9406080.

The previous prime is 28308887. The next prime is 28308911. The reversal of 28308888 is 88880382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28308881) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40623 + ... + 41313.

Almost surely, 2^28308888 is an apocalyptic number.

It is an amenable number.

28308888 is an abundant number, since it is smaller than the sum of its proper divisors (48606912).

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

28308888 is a wasteful number, since it uses less digits than its factorization.

28308888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272 (or 1265 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 45.

The square root of 28308888 is about 5320.6097394941. The cubic root of 28308888 is about 304.7714421339.

The spelling of 28308888 in words is "twenty-eight million, three hundred eight thousand, eight hundred eighty-eight".