28380684 has 24 divisors (see below), whose sum is σ = 70117488. Its totient is φ = 8903680.

The previous prime is 28380673. The next prime is 28380707. The reversal of 28380684 is 48608382.

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, 69357 + ... + 69764.

It is an arithmetic number, because the mean of its divisors is an integer number (2921562).

Almost surely, 2^28380684 is an apocalyptic number.

It is an amenable number.

28380684 is an abundant number, since it is smaller than the sum of its proper divisors (41736804).

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

28380684 is a wasteful number, since it uses less digits than its factorization.

28380684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139145 (or 139143 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 39.

The square root of 28380684 is about 5327.3524381253. The cubic root of 28380684 is about 305.0288748082.

The spelling of 28380684 in words is "twenty-eight million, three hundred eighty thousand, six hundred eighty-four".