28481584 has 10 divisors (see below), whose sum is σ = 55183100. Its totient is φ = 14240784.

The previous prime is 28481573. The next prime is 28481603. The reversal of 28481584 is 48518482.

It is a super-2 number, since 2×28481584² = 1622401254298112, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 890034 + ... + 890065.

It is an arithmetic number, because the mean of its divisors is an integer number (5518310).

Almost surely, 2^28481584 is an apocalyptic number.

It is an amenable number.

28481584 is a deficient number, since it is larger than the sum of its proper divisors (26701516).

28481584 is a wasteful number, since it uses less digits than its factorization.

28481584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780107 (or 1780101 counting only the distinct ones).

The product of its digits is 81920, while the sum is 40.

The square root of 28481584 is about 5336.8140308615. The cubic root of 28481584 is about 305.3899303732.

The spelling of 28481584 in words is "twenty-eight million, four hundred eighty-one thousand, five hundred eighty-four".