28539315 has 72 divisors (see below), whose sum is σ = 59061600. Its totient is φ = 12743136.

The previous prime is 28539289. The next prime is 28539337. The reversal of 28539315 is 51393582.

It is not a de Polignac number, because 28539315 - 2⁵ = 28539283 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28539315.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 663684 + ... + 663726.

It is an arithmetic number, because the mean of its divisors is an integer number (820300).

Almost surely, 2^28539315 is an apocalyptic number.

28539315 is an abundant number, since it is smaller than the sum of its proper divisors (30522285).

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

28539315 is an equidigital number, since it uses as much as digits as its factorization.

28539315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118 (or 58 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 28539315 is about 5342.2200441390. The cubic root of 28539315 is about 305.5961287292.

It can be divided in two parts, 2853 and 9315, that multiplied together give a triangular number (26575695 = T₇₂₉₀).

The spelling of 28539315 in words is "twenty-eight million, five hundred thirty-nine thousand, three hundred fifteen".