28861584 has 20 divisors (see below), whose sum is σ = 74559216. Its totient is φ = 9620512.

The previous prime is 28861579. The next prime is 28861603. The reversal of 28861584 is 48516882.

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, 300594 + ... + 300689.

Almost surely, 2^28861584 is an apocalyptic number.

28861584 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28861584 is an abundant number, since it is smaller than the sum of its proper divisors (45697632).

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

28861584 is a wasteful number, since it uses less digits than its factorization.

28861584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 601294 (or 601288 counting only the distinct ones).

The product of its digits is 122880, while the sum is 42.

The square root of 28861584 is about 5372.2978323991. The cubic root of 28861584 is about 306.7421007458.

The spelling of 28861584 in words is "twenty-eight million, eight hundred sixty-one thousand, five hundred eighty-four".