28030680 has 48 divisors (see below), whose sum is σ = 91100880. Its totient is φ = 7474752.

The previous prime is 28030679. The next prime is 28030697. The reversal of 28030680 is 8603082.

28030680 = 387² + 388² + ... + 521².

28030680 is a `hidden beast` number, since 280 + 306 + 80 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38572 + ... + 39291.

It is an arithmetic number, because the mean of its divisors is an integer number (1897935).

Almost surely, 2^28030680 is an apocalyptic number.

28030680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28030680 is an abundant number, since it is smaller than the sum of its proper divisors (63070200).

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

28030680 is a wasteful number, since it uses less digits than its factorization.

28030680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77880 (or 77873 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 28030680 is about 5294.4008159564. The cubic root of 28030680 is about 303.7697645017.

The spelling of 28030680 in words is "twenty-eight million, thirty thousand, six hundred eighty".