6939830 has 16 divisors (see below), whose sum is σ = 12564720. Its totient is φ = 2759712.

The previous prime is 6939827. The next prime is 6939887. The reversal of 6939830 is 389396.

6939830 = 101² + 102² + ... + 279².

It is a happy number.

It is a super-2 number, since 2×6939830² = 96322480857800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149 + ... + 3728.

It is an arithmetic number, because the mean of its divisors is an integer number (785295).

Almost surely, 2^6939830 is an apocalyptic number.

6939830 is a deficient number, since it is larger than the sum of its proper divisors (5624890).

6939830 is a wasteful number, since it uses less digits than its factorization.

6939830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4063.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 6939830 is about 2634.3557087075. The cubic root of 6939830 is about 190.7434399667.

The spelling of 6939830 in words is "six million, nine hundred thirty-nine thousand, eight hundred thirty".