28812860 has 24 divisors (see below), whose sum is σ = 61190640. Its totient is φ = 11394944.

The previous prime is 28812821. The next prime is 28812877. The reversal of 28812860 is 6821882.

It is a self number, because there is not a number n which added to its sum of digits gives 28812860.

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, 6314 + ... + 9873.

It is an arithmetic number, because the mean of its divisors is an integer number (2549610).

Almost surely, 2^28812860 is an apocalyptic number.

28812860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28812860 is an abundant number, since it is smaller than the sum of its proper divisors (32377780).

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

28812860 is a wasteful number, since it uses less digits than its factorization.

28812860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16285 (or 16283 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 28812860 is about 5367.7611720344. The cubic root of 28812860 is about 306.5693899614.

The spelling of 28812860 in words is "twenty-eight million, eight hundred twelve thousand, eight hundred sixty".