7904386 has 12 divisors (see below), whose sum is σ = 13792518. Its totient is φ = 3387552.

The previous prime is 7904381. The next prime is 7904417. The reversal of 7904386 is 6834097.

It can be written as a sum of positive squares in only one way, i.e., 3980025 + 3924361 = 1995^2 + 1981^2 .

It is not an unprimeable number, because it can be changed into a prime (7904381) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40231 + ... + 40426.

Almost surely, 2^7904386 is an apocalyptic number.

7904386 is a deficient number, since it is larger than the sum of its proper divisors (5888132).

7904386 is a wasteful number, since it uses less digits than its factorization.

7904386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80673 (or 80666 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 7904386 is about 2811.4739906320. The cubic root of 7904386 is about 199.2000211018.

The spelling of 7904386 in words is "seven million, nine hundred four thousand, three hundred eighty-six".