28718600 has 24 divisors (see below), whose sum is σ = 66771210. Its totient is φ = 11487360.

The previous prime is 28718579. The next prime is 28718603. The reversal of 28718600 is 681782.

It can be written as a sum of positive squares in 3 ways, for example, as 11957764 + 16760836 = 3458^2 + 4094^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28718603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 71597 + ... + 71996.

Almost surely, 2^28718600 is an apocalyptic number.

28718600 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28718600 is an abundant number, since it is smaller than the sum of its proper divisors (38052610).

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

28718600 is a wasteful number, since it uses less digits than its factorization.

28718600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143609 (or 143600 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 28718600 is about 5358.9737823580. The cubic root of 28718600 is about 306.2347153277.

The spelling of 28718600 in words is "twenty-eight million, seven hundred eighteen thousand, six hundred".