7945918 has 4 divisors (see below), whose sum is σ = 11918880. Its totient is φ = 3972958.

The previous prime is 7945909. The next prime is 7945937. The reversal of 7945918 is 8195497.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×7945918² = 126275225725448, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1986478 + ... + 1986481.

It is an arithmetic number, because the mean of its divisors is an integer number (2979720).

Almost surely, 2^7945918 is an apocalyptic number.

7945918 is a deficient number, since it is larger than the sum of its proper divisors (3972962).

7945918 is a wasteful number, since it uses less digits than its factorization.

7945918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3972961.

The product of its digits is 90720, while the sum is 43.

The square root of 7945918 is about 2818.8504749277. The cubic root of 7945918 is about 199.5482972579.

The spelling of 7945918 in words is "seven million, nine hundred forty-five thousand, nine hundred eighteen".