31471968 has 48 divisors (see below), whose sum is σ = 90127296. Its totient is φ = 9536640.

The previous prime is 31471967. The next prime is 31471991. The reversal of 31471968 is 86917413.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31471967) 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, 13846 + ... + 15957.

It is an arithmetic number, because the mean of its divisors is an integer number (1877652).

Almost surely, 2^31471968 is an apocalyptic number.

It is an amenable number.

31471968 is an abundant number, since it is smaller than the sum of its proper divisors (58655328).

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

31471968 is a wasteful number, since it uses less digits than its factorization.

31471968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29827 (or 29819 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The square root of 31471968 is about 5609.9882352818. The cubic root of 31471968 is about 315.7242694381.

It can be divided in two parts, 3147 and 1968, that added together give a palindrome (5115).

The spelling of 31471968 in words is "thirty-one million, four hundred seventy-one thousand, nine hundred sixty-eight".