8724240 has 160 divisors (see below), whose sum is σ = 34402560. Its totient is φ = 1990656.

The previous prime is 8724223. The next prime is 8724241. The reversal of 8724240 is 424278.

It is a super-2 number, since 2×8724240² = 152224727155200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (8724241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14832 + ... + 15408.

It is an arithmetic number, because the mean of its divisors is an integer number (215016).

Almost surely, 2^8724240 is an apocalyptic number.

8724240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8724240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17201280).

8724240 is an abundant number, since it is smaller than the sum of its proper divisors (25678320).

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

8724240 is a wasteful number, since it uses less digits than its factorization.

8724240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606 (or 594 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 8724240 is about 2953.6824473867. The cubic root of 8724240 is about 205.8618484902.

The spelling of 8724240 in words is "eight million, seven hundred twenty-four thousand, two hundred forty".