28507704 has 16 divisors (see below), whose sum is σ = 71269320. Its totient is φ = 9502560.

The previous prime is 28507697. The next prime is 28507729. The reversal of 28507704 is 40770582.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 593887 + ... + 593934.

Almost surely, 2^28507704 is an apocalyptic number.

28507704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28507704 is an abundant number, since it is smaller than the sum of its proper divisors (42761616).

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

28507704 is a wasteful number, since it uses less digits than its factorization.

28507704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187830 (or 1187826 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 28507704 is about 5339.2606229702. The cubic root of 28507704 is about 305.4832579045.

The spelling of 28507704 in words is "twenty-eight million, five hundred seven thousand, seven hundred four".