331690 has 16 divisors (see below), whose sum is σ = 612360. Its totient is φ = 129280.

The previous prime is 331663. The next prime is 331691. The reversal of 331690 is 96133.

It can be written as a sum of positive squares in 4 ways, for example, as 247009 + 84681 = 497^2 + 291^2 .

It is a super-2 number, since 2×331690² = 220036512200, which contains 22 as substring.

It is a zygodrome in base 4.

It is not an unprimeable number, because it can be changed into a prime (331691) 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, 6 + ... + 814.

2³³¹⁶⁹⁰ is an apocalyptic number.

331690 is a deficient number, since it is larger than the sum of its proper divisors (280670).

331690 is a wasteful number, since it uses less digits than its factorization.

331690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 857.

The product of its (nonzero) digits is 486, while the sum is 22.

The square root of 331690 is about 575.9253423839. The cubic root of 331690 is about 69.2219973058.

The spelling of 331690 in words is "three hundred thirty-one thousand, six hundred ninety".