28875320 has 16 divisors (see below), whose sum is σ = 64969560. Its totient is φ = 11550112.

The previous prime is 28875313. The next prime is 28875331. The reversal of 28875320 is 2357882.

It is a happy number.

It is a congruent 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, 360902 + ... + 360981.

Almost surely, 2^28875320 is an apocalyptic number.

28875320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28875320 is an abundant number, since it is smaller than the sum of its proper divisors (36094240).

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

28875320 is a wasteful number, since it uses less digits than its factorization.

28875320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 721894 (or 721890 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 28875320 is about 5373.5760904634. The cubic root of 28875320 is about 306.7907552855.

The spelling of 28875320 in words is "twenty-eight million, eight hundred seventy-five thousand, three hundred twenty".