7940818 has 4 divisors (see below), whose sum is σ = 11911230. Its totient is φ = 3970408.

The previous prime is 7940813. The next prime is 7940833. The reversal of 7940818 is 8180497.

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

It can be written as a sum of positive squares in only one way, i.e., 7935489 + 5329 = 2817^2 + 73^2 .

It is not an unprimeable number, because it can be changed into a prime (7940813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1985203 + ... + 1985206.

Almost surely, 2^7940818 is an apocalyptic number.

7940818 is a deficient number, since it is larger than the sum of its proper divisors (3970412).

7940818 is a wasteful number, since it uses less digits than its factorization.

7940818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3970411.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 7940818 is about 2817.9457056515. The cubic root of 7940818 is about 199.5055954947.

The spelling of 7940818 in words is "seven million, nine hundred forty thousand, eight hundred eighteen".