9918724 has 12 divisors (see below), whose sum is σ = 17761744. Its totient is φ = 4843944.

The previous prime is 9918721. The next prime is 9918743. The reversal of 9918724 is 4278199.

It is a hoax number, since the sum of its digits (40) 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 (9918721) 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, 28662 + ... + 29005.

Almost surely, 2^9918724 is an apocalyptic number.

It is an amenable number.

9918724 is a deficient number, since it is larger than the sum of its proper divisors (7843020).

9918724 is a wasteful number, since it uses less digits than its factorization.

9918724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57714 (or 57712 counting only the distinct ones).

The product of its digits is 36288, while the sum is 40.

The square root of 9918724 is about 3149.4005778878. The cubic root of 9918724 is about 214.8582010736.

The spelling of 9918724 in words is "nine million, nine hundred eighteen thousand, seven hundred twenty-four".