28123584 has 28 divisors (see below), whose sum is σ = 74410824. Its totient is φ = 9374464.

The previous prime is 28123573. The next prime is 28123607. The reversal of 28123584 is 48532182.

It is a congruent number.

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, 73047 + ... + 73430.

Almost surely, 2^28123584 is an apocalyptic number.

28123584 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28123584 is an abundant number, since it is smaller than the sum of its proper divisors (46287240).

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

28123584 is a wasteful number, since it uses less digits than its factorization.

28123584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146492 (or 146482 counting only the distinct ones).

The product of its digits is 15360, while the sum is 33.

The square root of 28123584 is about 5303.1673554584. The cubic root of 28123584 is about 304.1049960497.

The spelling of 28123584 in words is "twenty-eight million, one hundred twenty-three thousand, five hundred eighty-four".