31845712 has 20 divisors (see below), whose sum is σ = 63829620. Its totient is φ = 15373568.

The previous prime is 31845673. The next prime is 31845719. The reversal of 31845712 is 21754813.

It can be written as a sum of positive squares in 2 ways, for example, as 20394256 + 11451456 = 4516^2 + 3384^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31845719) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33853 + ... + 34780.

It is an arithmetic number, because the mean of its divisors is an integer number (3191481).

Almost surely, 2^31845712 is an apocalyptic number.

It is an amenable number.

31845712 is an abundant number, since it is smaller than the sum of its proper divisors (31983908).

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

31845712 is a wasteful number, since it uses less digits than its factorization.

31845712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68670 (or 68664 counting only the distinct ones).

The product of its digits is 6720, while the sum is 31.

The square root of 31845712 is about 5643.2005103487. The cubic root of 31845712 is about 316.9691445320.

The spelling of 31845712 in words is "thirty-one million, eight hundred forty-five thousand, seven hundred twelve".