28312760 has 32 divisors (see below), whose sum is σ = 72804960. Its totient is φ = 9707136.

The previous prime is 28312751. The next prime is 28312789. The reversal of 28312760 is 6721382.

It is a happy number.

It is a super-2 number, since 2×28312760² = 1603224757635200, which contains 22 as substring.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50279 + ... + 50838.

It is an arithmetic number, because the mean of its divisors is an integer number (2275155).

Almost surely, 2^28312760 is an apocalyptic number.

28312760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28312760 is an abundant number, since it is smaller than the sum of its proper divisors (44492200).

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

28312760 is a wasteful number, since it uses less digits than its factorization.

28312760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101135 (or 101131 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 28312760 is about 5320.9735951234. The cubic root of 28312760 is about 304.7853367245.

The spelling of 28312760 in words is "twenty-eight million, three hundred twelve thousand, seven hundred sixty".