331393636 has 48 divisors (see below), whose sum is σ = 680037120. Its totient is φ = 138378240.

The previous prime is 331393633. The next prime is 331393661. The reversal of 331393636 is 636393133.

It is a junction number, because it is equal to n+sod(n) for n = 331393595 and 331393604.

It is not an unprimeable number, because it can be changed into a prime (331393633) 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, 175996 + ... + 177868.

It is an arithmetic number, because the mean of its divisors is an integer number (14167440).

Almost surely, 2^331393636 is an apocalyptic number.

It is an amenable number.

331393636 is an abundant number, since it is smaller than the sum of its proper divisors (348643484).

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

331393636 is a wasteful number, since it uses less digits than its factorization.

331393636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044 (or 2042 counting only the distinct ones).

The product of its digits is 78732, while the sum is 37.

The square root of 331393636 is about 18204.2202799241. The cubic root of 331393636 is about 692.0137461490.

The spelling of 331393636 in words is "three hundred thirty-one million, three hundred ninety-three thousand, six hundred thirty-six".