7668440 has 32 divisors (see below), whose sum is σ = 18582480. Its totient is φ = 2831232.

The previous prime is 7668433. The next prime is 7668449. The reversal of 7668440 is 448667.

It is a self number, because there is not a number n which added to its sum of digits gives 7668440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7668449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6854 + ... + 7893.

Almost surely, 2^7668440 is an apocalyptic number.

It is an amenable number.

7668440 is an abundant number, since it is smaller than the sum of its proper divisors (10914040).

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

7668440 is a wasteful number, since it uses less digits than its factorization.

7668440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14771 (or 14767 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 7668440 is about 2769.1948288266. The cubic root of 7668440 is about 197.1979252251.

The spelling of 7668440 in words is "seven million, six hundred sixty-eight thousand, four hundred forty".