7406440 has 16 divisors (see below), whose sum is σ = 16664580. Its totient is φ = 2962560.

The previous prime is 7406423. The next prime is 7406453. The reversal of 7406440 is 446047.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 7214596 + 191844 = 2686^2 + 438^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92541 + ... + 92620.

Almost surely, 2^7406440 is an apocalyptic number.

It is an amenable number.

7406440 is an abundant number, since it is smaller than the sum of its proper divisors (9258140).

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

7406440 is a wasteful number, since it uses less digits than its factorization.

7406440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185172 (or 185168 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 7406440 is about 2721.4775398669. The cubic root of 7406440 is about 194.9260293621.

The spelling of 7406440 in words is "seven million, four hundred six thousand, four hundred forty".