8440724 has 18 divisors (see below), whose sum is σ = 15445290. Its totient is φ = 4035856.

The previous prime is 8440703. The next prime is 8440739. The reversal of 8440724 is 4270448.

It can be written as a sum of positive squares in only one way, i.e., 7118224 + 1322500 = 2668^2 + 1150^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 122 + ... + 4110.

Almost surely, 2^8440724 is an apocalyptic number.

It is an amenable number.

8440724 is a deficient number, since it is larger than the sum of its proper divisors (7004566).

8440724 is a wasteful number, since it uses less digits than its factorization.

8440724 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4039 (or 4014 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 29.

The square root of 8440724 is about 2905.2924121334. The cubic root of 8440724 is about 203.6072476683.

The spelling of 8440724 in words is "eight million, four hundred forty thousand, seven hundred twenty-four".