7940218 has 16 divisors (see below), whose sum is σ = 13993056. Its totient is φ = 3331440.

The previous prime is 7940209. The next prime is 7940239. The reversal of 7940218 is 8120497.

It is a self number, because there is not a number n which added to its sum of digits gives 7940218.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13596 + ... + 14167.

It is an arithmetic number, because the mean of its divisors is an integer number (874566).

Almost surely, 2^7940218 is an apocalyptic number.

7940218 is a deficient number, since it is larger than the sum of its proper divisors (6052838).

7940218 is a wasteful number, since it uses less digits than its factorization.

7940218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27789.

The product of its (nonzero) digits is 4032, while the sum is 31.

The square root of 7940218 is about 2817.8392431081. The cubic root of 7940218 is about 199.5005705559.

The spelling of 7940218 in words is "seven million, nine hundred forty thousand, two hundred eighteen".