7918388 has 12 divisors (see below), whose sum is σ = 13935012. Its totient is φ = 3936960.

The previous prime is 7918387. The next prime is 7918397. The reversal of 7918388 is 8838197.

7918388 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3541924 + 4376464 = 1882^2 + 2092^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7918381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4745 + ... + 6192.

It is an arithmetic number, because the mean of its divisors is an integer number (1161251).

Almost surely, 2^7918388 is an apocalyptic number.

It is an amenable number.

7918388 is a deficient number, since it is larger than the sum of its proper divisors (6016624).

7918388 is a wasteful number, since it uses less digits than its factorization.

7918388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11122 (or 11120 counting only the distinct ones).

The product of its digits is 96768, while the sum is 44.

The square root of 7918388 is about 2813.9630416905. The cubic root of 7918388 is about 199.3175741230.

The spelling of 7918388 in words is "seven million, nine hundred eighteen thousand, three hundred eighty-eight".