28086700 has 36 divisors (see below), whose sum is σ = 62603632. Its totient is φ = 10929600.

The previous prime is 28086691. The next prime is 28086701. The reversal of 28086700 is 768082.

It is not an unprimeable number, because it can be changed into a prime (28086701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96 + ... + 7495.

Almost surely, 2^28086700 is an apocalyptic number.

28086700 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 28086700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31301816).

28086700 is an abundant number, since it is smaller than the sum of its proper divisors (34516932).

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

28086700 is a wasteful number, since it uses less digits than its factorization.

28086700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7642 (or 7635 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 28086700 is about 5299.6886701013. The cubic root of 28086700 is about 303.9719936111.

The spelling of 28086700 in words is "twenty-eight million, eighty-six thousand, seven hundred".