7722240 has 72 divisors (see below), whose sum is σ = 24675168. Its totient is φ = 2058240.

The previous prime is 7722229. The next prime is 7722251. The reversal of 7722240 is 422277.

It is an interprime number because it is at equal distance from previous prime (7722229) and next prime (7722251).

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

It is a self number, because there is not a number n which added to its sum of digits gives 7722240.

It is a congruent number.

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, 2835 + ... + 4845.

Almost surely, 2^7722240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7722240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12337584).

7722240 is an abundant number, since it is smaller than the sum of its proper divisors (16952928).

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

7722240 is a wasteful number, since it uses less digits than its factorization.

7722240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2035 (or 2021 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 24.

The square root of 7722240 is about 2778.8918654744. The cubic root of 7722240 is about 197.6580159325.

The spelling of 7722240 in words is "seven million, seven hundred twenty-two thousand, two hundred forty".