31768442 has 4 divisors (see below), whose sum is σ = 47652666. Its totient is φ = 15884220.

The previous prime is 31768433. The next prime is 31768447. The reversal of 31768442 is 24486713.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 22762441 + 9006001 = 4771^2 + 3001^2 .

It is not an unprimeable number, because it can be changed into a prime (31768447) 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 as a sum of consecutive naturals, namely, 7942109 + ... + 7942112.

Almost surely, 2^31768442 is an apocalyptic number.

31768442 is a deficient number, since it is larger than the sum of its proper divisors (15884224).

31768442 is a wasteful number, since it uses less digits than its factorization.

31768442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15884223.

The product of its digits is 32256, while the sum is 35.

The square root of 31768442 is about 5636.3500601010. The cubic root of 31768442 is about 316.7125737077.

The spelling of 31768442 in words is "thirty-one million, seven hundred sixty-eight thousand, four hundred forty-two".