31143408 has 40 divisors (see below), whose sum is σ = 80792448. Its totient is φ = 10337472.

The previous prime is 31143407. The next prime is 31143433. The reversal of 31143408 is 80434113.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31143407) 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, 11391 + ... + 13857.

Almost surely, 2^31143408 is an apocalyptic number.

It is an amenable number.

31143408 is an abundant number, since it is smaller than the sum of its proper divisors (49649040).

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

31143408 is a wasteful number, since it uses less digits than its factorization.

31143408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2741 (or 2735 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 31143408 is about 5580.6279216590. The cubic root of 31143408 is about 314.6217278382.

It can be divided in two parts, 3 and 1143408, that added together give a palindrome (1143411).

The spelling of 31143408 in words is "thirty-one million, one hundred forty-three thousand, four hundred eight".