6397690 has 32 divisors (see below), whose sum is σ = 12836880. Its totient is φ = 2279424.

The previous prime is 6397667. The next prime is 6397691. The reversal of 6397690 is 967936.

It can be written as a sum of positive squares in 8 ways, for example, as 3463321 + 2934369 = 1861^2 + 1713^2 .

It is a super-2 number, since 2×6397690² = 81860874672200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6397691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2922 + ... + 4618.

Almost surely, 2^6397690 is an apocalyptic number.

6397690 is an abundant number, since it is smaller than the sum of its proper divisors (6439190).

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

6397690 is a wasteful number, since it uses less digits than its factorization.

6397690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1746.

The product of its (nonzero) digits is 61236, while the sum is 40.

The square root of 6397690 is about 2529.3655330932. The cubic root of 6397690 is about 185.6412130102.

The spelling of 6397690 in words is "six million, three hundred ninety-seven thousand, six hundred ninety".