28472625 has 24 divisors (see below), whose sum is σ = 51328680. Its totient is φ = 15184800.

The previous prime is 28472617. The next prime is 28472629. The reversal of 28472625 is 52627482.

28472625 is a `hidden beast` number, since 28 + 4 + 7 + 2 + 625 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 720801 + 27751824 = 849^2 + 5268^2 .

It is not a de Polignac number, because 28472625 - 2³ = 28472617 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28472625.

It is not an unprimeable number, because it can be changed into a prime (28472629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11530 + ... + 13779.

It is an arithmetic number, because the mean of its divisors is an integer number (2138695).

Almost surely, 2^28472625 is an apocalyptic number.

28472625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28472625 is a deficient number, since it is larger than the sum of its proper divisors (22856055).

28472625 is a wasteful number, since it uses less digits than its factorization.

28472625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25330 (or 25317 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 28472625 is about 5335.9746063864. The cubic root of 28472625 is about 305.3579064602.

The spelling of 28472625 in words is "twenty-eight million, four hundred seventy-two thousand, six hundred twenty-five".