6999940 has 24 divisors (see below), whose sum is σ = 14841792. Its totient is φ = 2772960.

The previous prime is 6999929. The next prime is 6999973. The reversal of 6999940 is 499996.

It is a happy number.

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, 505 + ... + 3775.

It is an arithmetic number, because the mean of its divisors is an integer number (618408).

Almost surely, 2^6999940 is an apocalyptic number.

It is an amenable number.

6999940 is an abundant number, since it is smaller than the sum of its proper divisors (7841852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6999940 is a wasteful number, since it uses less digits than its factorization.

6999940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3387 (or 3385 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 6999940 is about 2645.7399721061. The cubic root of 6999940 is about 191.2925717239.

The spelling of 6999940 in words is "six million, nine hundred ninety-nine thousand, nine hundred forty".