31478712 has 32 divisors (see below), whose sum is σ = 80826000. Its totient is φ = 10209024.

The previous prime is 31478701. The next prime is 31478719. The reversal of 31478712 is 21787413.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31478719) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16837 + ... + 18612.

Almost surely, 2^31478712 is an apocalyptic number.

It is an amenable number.

31478712 is an abundant number, since it is smaller than the sum of its proper divisors (49347288).

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

31478712 is a wasteful number, since it uses less digits than its factorization.

31478712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35495 (or 35491 counting only the distinct ones).

The product of its digits is 9408, while the sum is 33.

The square root of 31478712 is about 5610.5892738642. The cubic root of 31478712 is about 315.7468195839.

The spelling of 31478712 in words is "thirty-one million, four hundred seventy-eight thousand, seven hundred twelve".