28123596 has 18 divisors (see below), whose sum is σ = 71090292. Its totient is φ = 9374520.

The previous prime is 28123573. The next prime is 28123607. The reversal of 28123596 is 69532182.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 781211 = 28123596 / (2 + 8 + 1 + 2 + 3 + 5 + 9 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 28123596.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 390570 + ... + 390641.

Almost surely, 2^28123596 is an apocalyptic number.

It is an amenable number.

28123596 is an abundant number, since it is smaller than the sum of its proper divisors (42966696).

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

28123596 is a wasteful number, since it uses less digits than its factorization.

28123596 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781221 (or 781216 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 28123596 is about 5303.1684868576. The cubic root of 28123596 is about 304.1050393024.

The spelling of 28123596 in words is "twenty-eight million, one hundred twenty-three thousand, five hundred ninety-six".