7942440 has 96 divisors (see below), whose sum is σ = 26238240. Its totient is φ = 1921920.

The previous prime is 7942427. The next prime is 7942447. The reversal of 7942440 is 442497.

7942440 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 7942398 and 7942407.

It is not an unprimeable number, because it can be changed into a prime (7942447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14247 + ... + 14793.

It is an arithmetic number, because the mean of its divisors is an integer number (273315).

Almost surely, 2^7942440 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 7942440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13119120).

7942440 is an abundant number, since it is smaller than the sum of its proper divisors (18295800).

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

7942440 is a wasteful number, since it uses less digits than its factorization.

7942440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 583 (or 568 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 7942440 is about 2818.2334892624. The cubic root of 7942440 is about 199.5191783122.

The spelling of 7942440 in words is "seven million, nine hundred forty-two thousand, four hundred forty".