28564700 has 36 divisors (see below), whose sum is σ = 63506352. Its totient is φ = 11145600.

The previous prime is 28564687. The next prime is 28564717. The reversal of 28564700 is 746582.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 617 + ... + 7583.

Almost surely, 2^28564700 is an apocalyptic number.

28564700 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 28564700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31753176).

28564700 is an abundant number, since it is smaller than the sum of its proper divisors (34941652).

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

28564700 is a wasteful number, since it uses less digits than its factorization.

28564700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7022 (or 7015 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

The square root of 28564700 is about 5344.5954009635. The cubic root of 28564700 is about 305.6867085581.

The spelling of 28564700 in words is "twenty-eight million, five hundred sixty-four thousand, seven hundred".