331012638 has 24 divisors (see below), whose sum is σ = 782393976. Its totient is φ = 100306800.

The previous prime is 331012631. The next prime is 331012651. The reversal of 331012638 is 836210133.

It is a happy number.

331012638 is a `hidden beast` number, since 3 + 3 + 10 + 12 + 638 = 666.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331012631) 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 11 ways as a sum of consecutive naturals, for example, 835693 + ... + 836088.

It is an arithmetic number, because the mean of its divisors is an integer number (32599749).

Almost surely, 2^331012638 is an apocalyptic number.

331012638 is an abundant number, since it is smaller than the sum of its proper divisors (451381338).

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

331012638 is a wasteful number, since it uses less digits than its factorization.

331012638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1671800 (or 1671797 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 331012638 is about 18193.7527189967. The cubic root of 331012638 is about 691.7484453813.

The spelling of 331012638 in words is "three hundred thirty-one million, twelve thousand, six hundred thirty-eight".