7320840 has 32 divisors (see below), whose sum is σ = 21962880. Its totient is φ = 1952192.

The previous prime is 7320827. The next prime is 7320853. The reversal of 7320840 is 480237.

7320840 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (7320827) and next prime (7320853).

It is a hoax number, since the sum of its digits (24) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 7320840.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30384 + ... + 30623.

It is an arithmetic number, because the mean of its divisors is an integer number (686340).

Almost surely, 2^7320840 is an apocalyptic number.

It is an amenable number.

7320840 is an abundant number, since it is smaller than the sum of its proper divisors (14642040).

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

7320840 is a wasteful number, since it uses less digits than its factorization.

7320840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61021 (or 61017 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 7320840 is about 2705.7050837074. The cubic root of 7320840 is about 194.1721644531.

The spelling of 7320840 in words is "seven million, three hundred twenty thousand, eight hundred forty".