8724840 has 32 divisors (see below), whose sum is σ = 26174880. Its totient is φ = 2326592.

The previous prime is 8724827. The next prime is 8724847. The reversal of 8724840 is 484278.

It is a super-2 number, since 2×8724840² = 152245666051200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (8724847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36234 + ... + 36473.

It is an arithmetic number, because the mean of its divisors is an integer number (817965).

Almost surely, 2^8724840 is an apocalyptic number.

It is an amenable number.

8724840 is an abundant number, since it is smaller than the sum of its proper divisors (17450040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8724840 is a wasteful number, since it uses less digits than its factorization.

8724840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72721 (or 72717 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 8724840 is about 2953.7840137695. The cubic root of 8724840 is about 205.8665676893.

The spelling of 8724840 in words is "eight million, seven hundred twenty-four thousand, eight hundred forty".