28372864 has 96 divisors (see below), whose sum is σ = 65759400. Its totient is φ = 12115968.

The previous prime is 28372853. The next prime is 28372901. The reversal of 28372864 is 46827382.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 480867 + ... + 480925.

Almost surely, 2^28372864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28372864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32879700).

28372864 is an abundant number, since it is smaller than the sum of its proper divisors (37386536).

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

28372864 is a wasteful number, since it uses less digits than its factorization.

28372864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120 (or 91 counting only the distinct ones).

The product of its digits is 129024, while the sum is 40.

The square root of 28372864 is about 5326.6184394980. The cubic root of 28372864 is about 305.0008563982. Note that the first 3 decimals are identical.

The spelling of 28372864 in words is "twenty-eight million, three hundred seventy-two thousand, eight hundred sixty-four".