28504605 has 16 divisors (see below), whose sum is σ = 45682560. Its totient is φ = 15177408.

The previous prime is 28504603. The next prime is 28504621. The reversal of 28504605 is 50640582.

It is not a de Polignac number, because 28504605 - 2¹ = 28504603 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28504601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11191 + ... + 13499.

It is an arithmetic number, because the mean of its divisors is an integer number (2855160).

Almost surely, 2^28504605 is an apocalyptic number.

It is an amenable number.

28504605 is a deficient number, since it is larger than the sum of its proper divisors (17177955).

28504605 is a wasteful number, since it uses less digits than its factorization.

28504605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3140.

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 28504605 is about 5338.9704063611. The cubic root of 28504605 is about 305.4721880673.

The spelling of 28504605 in words is "twenty-eight million, five hundred four thousand, six hundred five".