6939870 has 48 divisors (see below), whose sum is σ = 19379088. Its totient is φ = 1585920.

The previous prime is 6939827. The next prime is 6939887. The reversal of 6939870 is 789396.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 891 + ... + 3830.

It is an arithmetic number, because the mean of its divisors is an integer number (403731).

Almost surely, 2^6939870 is an apocalyptic number.

6939870 is an abundant number, since it is smaller than the sum of its proper divisors (12439218).

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

6939870 is a wasteful number, since it uses less digits than its factorization.

6939870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4745 (or 4738 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 6939870 is about 2634.3633006858. The cubic root of 6939870 is about 190.7438064369.

The spelling of 6939870 in words is "six million, nine hundred thirty-nine thousand, eight hundred seventy".