28908525 has 48 divisors (see below), whose sum is σ = 49996800. Its totient is φ = 14727360.

The previous prime is 28908521. The next prime is 28908541. The reversal of 28908525 is 52580982.

It is not a de Polignac number, because 28908525 - 2² = 28908521 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28908521) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 207906 + ... + 208044.

It is an arithmetic number, because the mean of its divisors is an integer number (1041600).

Almost surely, 2^28908525 is an apocalyptic number.

28908525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28908525 is a deficient number, since it is larger than the sum of its proper divisors (21088275).

28908525 is a wasteful number, since it uses less digits than its factorization.

28908525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 28908525 is about 5376.6648584415. The cubic root of 28908525 is about 306.9083076300.

The spelling of 28908525 in words is "twenty-eight million, nine hundred eight thousand, five hundred twenty-five".