6940890 has 160 divisors (see below), whose sum is σ = 21954240. Its totient is φ = 1555200.

The previous prime is 6940873. The next prime is 6940891. The reversal of 6940890 is 980496.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6940891) by changing a digit.

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 79 ways as a sum of consecutive naturals, for example, 169270 + ... + 169310.

It is an arithmetic number, because the mean of its divisors is an integer number (137214).

Almost surely, 2^6940890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6940890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10977120).

6940890 is an abundant number, since it is smaller than the sum of its proper divisors (15013350).

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

6940890 is a wasteful number, since it uses less digits than its factorization.

6940890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90 (or 81 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 6940890 is about 2634.5568887386. The cubic root of 6940890 is about 190.7531509516.

The spelling of 6940890 in words is "six million, nine hundred forty thousand, eight hundred ninety".