28641264 has 20 divisors (see below), whose sum is σ = 73990056. Its totient is φ = 9547072.

The previous prime is 28641257. The next prime is 28641281. The reversal of 28641264 is 46214682.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298299 + ... + 298394.

Almost surely, 2^28641264 is an apocalyptic number.

28641264 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28641264 is an abundant number, since it is smaller than the sum of its proper divisors (45348792).

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

28641264 is a wasteful number, since it uses less digits than its factorization.

28641264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596704 (or 596698 counting only the distinct ones).

The product of its digits is 18432, while the sum is 33.

The square root of 28641264 is about 5351.7533575455. The cubic root of 28641264 is about 305.9595828544.

The spelling of 28641264 in words is "twenty-eight million, six hundred forty-one thousand, two hundred sixty-four".