28704786 has 16 divisors (see below), whose sum is σ = 62628768. Its totient is φ = 8698400.

The previous prime is 28704769. The next prime is 28704799. The reversal of 28704786 is 68740782.

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, 217395 + ... + 217526.

It is an arithmetic number, because the mean of its divisors is an integer number (3914298).

Almost surely, 2^28704786 is an apocalyptic number.

28704786 is an abundant number, since it is smaller than the sum of its proper divisors (33923982).

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

28704786 is a wasteful number, since it uses less digits than its factorization.

28704786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434937.

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 28704786 is about 5357.6847611632. The cubic root of 28704786 is about 306.1856065640.

The spelling of 28704786 in words is "twenty-eight million, seven hundred four thousand, seven hundred eighty-six".