28725508 has 12 divisors (see below), whose sum is σ = 57451072. Its totient is φ = 12310920.

The previous prime is 28725497. The next prime is 28725517. The reversal of 28725508 is 80552782.

28725508 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 512928 + ... + 512983.

Almost surely, 2^28725508 is an apocalyptic number.

28725508 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28725508 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28725508 is a wasteful number, since it uses less digits than its factorization.

28725508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1025922 (or 1025920 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 37.

The square root of 28725508 is about 5359.6182699890. The cubic root of 28725508 is about 306.2592673580.

The spelling of 28725508 in words is "twenty-eight million, seven hundred twenty-five thousand, five hundred eight".