31641768 has 48 divisors (see below), whose sum is σ = 85955220. Its totient is φ = 10515456.

The previous prime is 31641749. The next prime is 31641773. The reversal of 31641768 is 86714613.

31641768 is a `hidden beast` number, since 3 + 1 + 641 + 7 + 6 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 30008484 + 1633284 = 5478^2 + 1278^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46680 + ... + 47352.

Almost surely, 2^31641768 is an apocalyptic number.

It is an amenable number.

31641768 is an abundant number, since it is smaller than the sum of its proper divisors (54313452).

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

31641768 is a wasteful number, since it uses less digits than its factorization.

31641768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1338 (or 1331 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 31641768 is about 5625.1015990825. The cubic root of 31641768 is about 316.2910580094.

The spelling of 31641768 in words is "thirty-one million, six hundred forty-one thousand, seven hundred sixty-eight".