28570900 has 18 divisors (see below), whose sum is σ = 61999070. Its totient is φ = 11428320.

The previous prime is 28570879. The next prime is 28570907. The reversal of 28570900 is 907582.

It can be written as a sum of positive squares in 3 ways, for example, as 4892944 + 23677956 = 2212^2 + 4866^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28570907) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 142755 + ... + 142954.

Almost surely, 2^28570900 is an apocalyptic number.

28570900 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28570900 is an abundant number, since it is smaller than the sum of its proper divisors (33428170).

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

28570900 is a wasteful number, since it uses less digits than its factorization.

28570900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285723 (or 285716 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 28570900 is about 5345.1753946901. The cubic root of 28570900 is about 305.7088235052.

The spelling of 28570900 in words is "twenty-eight million, five hundred seventy thousand, nine hundred".