28113575 has 12 divisors (see below), whose sum is σ = 39841200. Its totient is φ = 19277760.

The previous prime is 28113571. The next prime is 28113601. The reversal of 28113575 is 57531182.

It is not a de Polignac number, because 28113575 - 2² = 28113571 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28113571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80150 + ... + 80499.

It is an arithmetic number, because the mean of its divisors is an integer number (3320100).

Almost surely, 2^28113575 is an apocalyptic number.

28113575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28113575 is a deficient number, since it is larger than the sum of its proper divisors (11727625).

28113575 is a wasteful number, since it uses less digits than its factorization.

28113575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160666 (or 160661 counting only the distinct ones).

The product of its digits is 8400, while the sum is 32.

The square root of 28113575 is about 5302.2235901554. The cubic root of 28113575 is about 304.0689154413.

The spelling of 28113575 in words is "twenty-eight million, one hundred thirteen thousand, five hundred seventy-five".