6938840 has 32 divisors (see below), whose sum is σ = 15996960. Its totient is φ = 2707200.

The previous prime is 6938837. The next prime is 6938849. The reversal of 6938840 is 488396.

It is a junction number, because it is equal to n+sod(n) for n = 6938794 and 6938803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6938849) by changing a digit.

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, 476 + ... + 3755.

It is an arithmetic number, because the mean of its divisors is an integer number (499905).

Almost surely, 2^6938840 is an apocalyptic number.

It is an amenable number.

6938840 is an abundant number, since it is smaller than the sum of its proper divisors (9058120).

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

6938840 is a wasteful number, since it uses less digits than its factorization.

6938840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4283 (or 4279 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 6938840 is about 2634.1678002739. The cubic root of 6938840 is about 190.7343693802.

The spelling of 6938840 in words is "six million, nine hundred thirty-eight thousand, eight hundred forty".