28724708 has 12 divisors (see below), whose sum is σ = 51338112. Its totient is φ = 14056680.

The previous prime is 28724701. The next prime is 28724711. The reversal of 28724708 is 80742782.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28724701) 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, 76208 + ... + 76583.

It is an arithmetic number, because the mean of its divisors is an integer number (4278176).

Almost surely, 2^28724708 is an apocalyptic number.

It is an amenable number.

28724708 is a deficient number, since it is larger than the sum of its proper divisors (22613404).

28724708 is a wasteful number, since it uses less digits than its factorization.

28724708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152842 (or 152840 counting only the distinct ones).

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 28724708 is about 5359.5436372885. The cubic root of 28724708 is about 306.2564242440.

The spelling of 28724708 in words is "twenty-eight million, seven hundred twenty-four thousand, seven hundred eight".