28712700 has 108 divisors (see below), whose sum is σ = 91648648. Its totient is φ = 7516800.

The previous prime is 28712699. The next prime is 28712713. The reversal of 28712700 is 721782.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 54639 + ... + 55161.

Almost surely, 2^28712700 is an apocalyptic number.

28712700 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 28712700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45824324).

28712700 is an abundant number, since it is smaller than the sum of its proper divisors (62935948).

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

28712700 is a wasteful number, since it uses less digits than its factorization.

28712700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604 (or 594 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 27.

The square root of 28712700 is about 5358.4232755541. The cubic root of 28712700 is about 306.2137427575.

The spelling of 28712700 in words is "twenty-eight million, seven hundred twelve thousand, seven hundred".