28925320 has 16 divisors (see below), whose sum is σ = 65082060. Its totient is φ = 11570112.

The previous prime is 28925317. The next prime is 28925341. The reversal of 28925320 is 2352982.

It can be written as a sum of positive squares in 2 ways, for example, as 28708164 + 217156 = 5358^2 + 466^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 361527 + ... + 361606.

Almost surely, 2^28925320 is an apocalyptic number.

28925320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28925320 is an abundant number, since it is smaller than the sum of its proper divisors (36156740).

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

28925320 is a wasteful number, since it uses less digits than its factorization.

28925320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723144 (or 723140 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 28925320 is about 5378.2264734762. The cubic root of 28925320 is about 306.9677310140.

The spelling of 28925320 in words is "twenty-eight million, nine hundred twenty-five thousand, three hundred twenty".