28474864 has 80 divisors (see below), whose sum is σ = 65995776. Its totient is φ = 11750400.

The previous prime is 28474843. The next prime is 28474871. The reversal of 28474864 is 46847482.

It is a self number, because there is not a number n which added to its sum of digits gives 28474864.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92599 + ... + 92905.

Almost surely, 2^28474864 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 28474864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32997888).

28474864 is an abundant number, since it is smaller than the sum of its proper divisors (37520912).

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

28474864 is a wasteful number, since it uses less digits than its factorization.

28474864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374 (or 368 counting only the distinct ones).

The product of its digits is 344064, while the sum is 43.

The square root of 28474864 is about 5336.1844046097. The cubic root of 28474864 is about 305.3659103871.

The spelling of 28474864 in words is "twenty-eight million, four hundred seventy-four thousand, eight hundred sixty-four".