28099580 has 12 divisors (see below), whose sum is σ = 59009160. Its totient is φ = 11239824.

The previous prime is 28099553. The next prime is 28099601. The reversal of 28099580 is 8599082.

It is a happy number.

It is a hoax number, since the sum of its digits (41) 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 3 ways as a sum of consecutive naturals, for example, 702470 + ... + 702509.

It is an arithmetic number, because the mean of its divisors is an integer number (4917430).

Almost surely, 2^28099580 is an apocalyptic number.

28099580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28099580 is an abundant number, since it is smaller than the sum of its proper divisors (30909580).

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

28099580 is a wasteful number, since it uses less digits than its factorization.

28099580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1404988 (or 1404986 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 28099580 is about 5300.9036965408. The cubic root of 28099580 is about 304.0184516732.

The spelling of 28099580 in words is "twenty-eight million, ninety-nine thousand, five hundred eighty".