7944340 has 12 divisors (see below), whose sum is σ = 16683156. Its totient is φ = 3177728.

The previous prime is 7944317. The next prime is 7944341. The reversal of 7944340 is 434497.

It can be written as a sum of positive squares in 2 ways, for example, as 4016016 + 3928324 = 2004^2 + 1982^2 .

It is a super-2 number, since 2×7944340² = 126225076071200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7944341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 198589 + ... + 198628.

It is an arithmetic number, because the mean of its divisors is an integer number (1390263).

Almost surely, 2^7944340 is an apocalyptic number.

It is an amenable number.

7944340 is an abundant number, since it is smaller than the sum of its proper divisors (8738816).

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

7944340 is a wasteful number, since it uses less digits than its factorization.

7944340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397226 (or 397224 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 7944340 is about 2818.5705596987. The cubic root of 7944340 is about 199.5350867826.

The spelling of 7944340 in words is "seven million, nine hundred forty-four thousand, three hundred forty".