331870690 has 8 divisors (see below), whose sum is σ = 597367260. Its totient is φ = 132748272.

The previous prime is 331870681. The next prime is 331870697. The reversal of 331870690 is 96078133.

It can be written as a sum of positive squares in 2 ways, for example, as 266244489 + 65626201 = 16317^2 + 8101^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×331870690² = 220276309762152200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (331870697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16593525 + ... + 16593544.

Almost surely, 2^331870690 is an apocalyptic number.

331870690 is a deficient number, since it is larger than the sum of its proper divisors (265496570).

331870690 is a wasteful number, since it uses less digits than its factorization.

331870690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33187076.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 331870690 is about 18217.3184085913. The cubic root of 331870690 is about 692.3456471531.

The spelling of 331870690 in words is "three hundred thirty-one million, eight hundred seventy thousand, six hundred ninety".