28570580 has 12 divisors (see below), whose sum is σ = 59998260. Its totient is φ = 11428224.

The previous prime is 28570571. The next prime is 28570621. The reversal of 28570580 is 8507582.

It can be written as a sum of positive squares in 2 ways, for example, as 8031556 + 20539024 = 2834^2 + 4532^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28570580.

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, 714245 + ... + 714284.

It is an arithmetic number, because the mean of its divisors is an integer number (4999855).

Almost surely, 2^28570580 is an apocalyptic number.

28570580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28570580 is an abundant number, since it is smaller than the sum of its proper divisors (31427680).

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

28570580 is a wasteful number, since it uses less digits than its factorization.

28570580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428538 (or 1428536 counting only the distinct ones).

The product of its (nonzero) digits is 22400, while the sum is 35.

The square root of 28570580 is about 5345.1454610703. The cubic root of 28570580 is about 305.7076821669.

The spelling of 28570580 in words is "twenty-eight million, five hundred seventy thousand, five hundred eighty".