7668390 has 16 divisors (see below), whose sum is σ = 18404208. Its totient is φ = 2044896.

The previous prime is 7668389. The next prime is 7668391. The reversal of 7668390 is 938667.

It is an interprime number because it is at equal distance from previous prime (7668389) and next prime (7668391).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7668391) 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, 127777 + ... + 127836.

It is an arithmetic number, because the mean of its divisors is an integer number (1150263).

Almost surely, 2^7668390 is an apocalyptic number.

7668390 is an abundant number, since it is smaller than the sum of its proper divisors (10735818).

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

7668390 is a wasteful number, since it uses less digits than its factorization.

7668390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255623.

The product of its (nonzero) digits is 54432, while the sum is 39.

The square root of 7668390 is about 2769.1858009169. The cubic root of 7668390 is about 197.1974966321.

The spelling of 7668390 in words is "seven million, six hundred sixty-eight thousand, three hundred ninety".