28463664 has 20 divisors (see below), whose sum is σ = 73531256. Its totient is φ = 9487872.

The previous prime is 28463641. The next prime is 28463707. The reversal of 28463664 is 46636482.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296449 + ... + 296544.

Almost surely, 2^28463664 is an apocalyptic number.

28463664 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28463664 is an abundant number, since it is smaller than the sum of its proper divisors (45067592).

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

28463664 is a wasteful number, since it uses less digits than its factorization.

28463664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593004 (or 592998 counting only the distinct ones).

The product of its digits is 165888, while the sum is 39.

The square root of 28463664 is about 5335.1348624004. The cubic root of 28463664 is about 305.3258686775.

The spelling of 28463664 in words is "twenty-eight million, four hundred sixty-three thousand, six hundred sixty-four".