28573860 has 72 divisors (see below), whose sum is σ = 93078720. Its totient is φ = 6530496.

The previous prime is 28573859. The next prime is 28573873. The reversal of 28573860 is 6837582.

28573860 = T₄₃₉ + T₄₄₀ + ... + T₆₃₄.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1920 + ... + 7799.

It is an arithmetic number, because the mean of its divisors is an integer number (1292760).

Almost surely, 2^28573860 is an apocalyptic number.

28573860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28573860 is an abundant number, since it is smaller than the sum of its proper divisors (64504860).

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

28573860 is a wasteful number, since it uses less digits than its factorization.

28573860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9745 (or 9736 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 28573860 is about 5345.4522727268. The cubic root of 28573860 is about 305.7193804807.

The spelling of 28573860 in words is "twenty-eight million, five hundred seventy-three thousand, eight hundred sixty".