6890690 has 16 divisors (see below), whose sum is σ = 12831480. Its totient is φ = 2661120.

The previous prime is 6890687. The next prime is 6890699. The reversal of 6890690 is 960986.

It can be written as a sum of positive squares in 4 ways, for example, as 5726449 + 1164241 = 2393^2 + 1079^2 .

It is a super-2 number, since 2×6890690² = 94963217352200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6890699) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11591 + ... + 12170.

Almost surely, 2^6890690 is an apocalyptic number.

6890690 is a deficient number, since it is larger than the sum of its proper divisors (5940790).

6890690 is a wasteful number, since it uses less digits than its factorization.

6890690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23797.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 6890690 is about 2625.0123809232. The cubic root of 6890690 is about 190.2921636205.

The spelling of 6890690 in words is "six million, eight hundred ninety thousand, six hundred ninety".