28513475 has 6 divisors (see below), whose sum is σ = 35356740. Its totient is φ = 22810760.

The previous prime is 28513453. The next prime is 28513493. The reversal of 28513475 is 57431582.

It is a happy number.

It is not a de Polignac number, because 28513475 - 2²² = 24319171 is a prime.

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, 570245 + ... + 570294.

It is an arithmetic number, because the mean of its divisors is an integer number (5892790).

Almost surely, 2^28513475 is an apocalyptic number.

28513475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28513475 is a deficient number, since it is larger than the sum of its proper divisors (6843265).

28513475 is a wasteful number, since it uses less digits than its factorization.

28513475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1140549 (or 1140544 counting only the distinct ones).

The product of its digits is 33600, while the sum is 35.

The square root of 28513475 is about 5339.8010262556. The cubic root of 28513475 is about 305.5038701681.

The spelling of 28513475 in words is "twenty-eight million, five hundred thirteen thousand, four hundred seventy-five".