28780084 has 24 divisors (see below), whose sum is σ = 53202240. Its totient is φ = 13594944.

The previous prime is 28780067. The next prime is 28780109. The reversal of 28780084 is 48008782.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5752 + ... + 9520.

It is an arithmetic number, because the mean of its divisors is an integer number (2216760).

Almost surely, 2^28780084 is an apocalyptic number.

It is an amenable number.

28780084 is a deficient number, since it is larger than the sum of its proper divisors (24422156).

28780084 is a wasteful number, since it uses less digits than its factorization.

28780084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3879 (or 3877 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 37.

The square root of 28780084 is about 5364.7072613517. The cubic root of 28780084 is about 306.4531000963.

The spelling of 28780084 in words is "twenty-eight million, seven hundred eighty thousand, eighty-four".