28726304 has 24 divisors (see below), whose sum is σ = 56892780. Its totient is φ = 14277376.

The previous prime is 28726283. The next prime is 28726307. The reversal of 28726304 is 40362782.

It can be written as a sum of positive squares in 2 ways, for example, as 24482704 + 4243600 = 4948^2 + 2060^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is not an unprimeable number, because it can be changed into a prime (28726307) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2942 + ... + 8130.

Almost surely, 2^28726304 is an apocalyptic number.

It is an amenable number.

28726304 is a deficient number, since it is larger than the sum of its proper divisors (28166476).

28726304 is a wasteful number, since it uses less digits than its factorization.

28726304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5372 (or 5364 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 28726304 is about 5359.6925284945. The cubic root of 28726304 is about 306.2620962042.

The spelling of 28726304 in words is "twenty-eight million, seven hundred twenty-six thousand, three hundred four".