28746724 has 6 divisors (see below), whose sum is σ = 50306774. Its totient is φ = 14373360.

The previous prime is 28746701. The next prime is 28746763. The reversal of 28746724 is 42764782.

It can be written as a sum of positive squares in only one way, i.e., 14684224 + 14062500 = 3832^2 + 3750^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3593337 + ... + 3593344.

Almost surely, 2^28746724 is an apocalyptic number.

It is an amenable number.

28746724 is a deficient number, since it is larger than the sum of its proper divisors (21560050).

28746724 is a wasteful number, since it uses less digits than its factorization.

28746724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7186685 (or 7186683 counting only the distinct ones).

The product of its digits is 150528, while the sum is 40.

The square root of 28746724 is about 5361.5971501037. The cubic root of 28746724 is about 306.3346474884.

The spelling of 28746724 in words is "twenty-eight million, seven hundred forty-six thousand, seven hundred twenty-four".