7940690 has 16 divisors (see below), whose sum is σ = 14342400. Its totient is φ = 3165360.

The previous prime is 7940663. The next prime is 7940707. The reversal of 7940690 is 960497.

It is a happy number.

It is a super-2 number, since 2×7940690² = 126109115352200, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 7940690.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2111 + ... + 4509.

It is an arithmetic number, because the mean of its divisors is an integer number (896400).

Almost surely, 2^7940690 is an apocalyptic number.

7940690 is a deficient number, since it is larger than the sum of its proper divisors (6401710).

7940690 is a wasteful number, since it uses less digits than its factorization.

7940690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2737.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 7940690 is about 2817.9229939798. The cubic root of 7940690 is about 199.5045235290.

The spelling of 7940690 in words is "seven million, nine hundred forty thousand, six hundred ninety".