28318624 has 24 divisors (see below), whose sum is σ = 57552768. Its totient is φ = 13702080.

The previous prime is 28318603. The next prime is 28318627. The reversal of 28318624 is 42681382.

It is a self number, because there is not a number n which added to its sum of digits gives 28318624.

It is not an unprimeable number, because it can be changed into a prime (28318627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13282 + ... + 15265.

It is an arithmetic number, because the mean of its divisors is an integer number (2398032).

Almost surely, 2^28318624 is an apocalyptic number.

It is an amenable number.

28318624 is an abundant number, since it is smaller than the sum of its proper divisors (29234144).

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

28318624 is a wasteful number, since it uses less digits than its factorization.

28318624 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28588 (or 28580 counting only the distinct ones).

The product of its digits is 18432, while the sum is 34.

The square root of 28318624 is about 5321.5245935728. The cubic root of 28318624 is about 304.8063771534.

The spelling of 28318624 in words is "twenty-eight million, three hundred eighteen thousand, six hundred twenty-four".