28964825 has 6 divisors (see below), whose sum is σ = 35916414. Its totient is φ = 23171840.

The previous prime is 28964809. The next prime is 28964833. The reversal of 28964825 is 52846982.

It can be written as a sum of positive squares in 3 ways, for example, as 7997584 + 20967241 = 2828^2 + 4579^2 .

It is not a de Polignac number, because 28964825 - 2⁴ = 28964809 is a prime.

It is a super-2 number, since 2×28964825² = 1677922174561250, which contains 22 as substring.

It is a Duffinian number.

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, 579272 + ... + 579321.

It is an arithmetic number, because the mean of its divisors is an integer number (5986069).

Almost surely, 2^28964825 is an apocalyptic number.

28964825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28964825 is a deficient number, since it is larger than the sum of its proper divisors (6951589).

28964825 is a wasteful number, since it uses less digits than its factorization.

28964825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158603 (or 1158598 counting only the distinct ones).

The product of its digits is 276480, while the sum is 44.

The square root of 28964825 is about 5381.8978994403. The cubic root of 28964825 is about 307.1074153650.

The spelling of 28964825 in words is "twenty-eight million, nine hundred sixty-four thousand, eight hundred twenty-five".