28570680 has 96 divisors (see below), whose sum is σ = 97765200. Its totient is φ = 7216128.

The previous prime is 28570673. The next prime is 28570733. The reversal of 28570680 is 8607582.

28570680 is a `hidden beast` number, since 2 + 8 + 570 + 6 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

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, 4752 + ... + 8928.

Almost surely, 2^28570680 is an apocalyptic number.

28570680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28570680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48882600).

28570680 is an abundant number, since it is smaller than the sum of its proper divisors (69194520).

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

28570680 is a wasteful number, since it uses less digits than its factorization.

28570680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4213 (or 4206 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 28570680 is about 5345.1548153445. The cubic root of 28570680 is about 305.7080388360.

The spelling of 28570680 in words is "twenty-eight million, five hundred seventy thousand, six hundred eighty".