28513704 has 16 divisors (see below), whose sum is σ = 71284320. Its totient is φ = 9504560.

The previous prime is 28513691. The next prime is 28513711. The reversal of 28513704 is 40731582.

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, 594012 + ... + 594059.

It is an arithmetic number, because the mean of its divisors is an integer number (4455270).

Almost surely, 2^28513704 is an apocalyptic number.

28513704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28513704 is an abundant number, since it is smaller than the sum of its proper divisors (42770616).

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

28513704 is a wasteful number, since it uses less digits than its factorization.

28513704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188080 (or 1188076 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 28513704 is about 5339.8224689591. The cubic root of 28513704 is about 305.5046880294.

It can be divided in two parts, 2851 and 3704, that added together give a triangular number (6555 = T₁₁₄).

The spelling of 28513704 in words is "twenty-eight million, five hundred thirteen thousand, seven hundred four".