31040432 has 20 divisors (see below), whose sum is σ = 62756400. Its totient is φ = 14845248.

The previous prime is 31040413. The next prime is 31040459. The reversal of 31040432 is 23404013.

It is a self number, because there is not a number n which added to its sum of digits gives 31040432.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41807 + ... + 42542.

It is an arithmetic number, because the mean of its divisors is an integer number (3137820).

Almost surely, 2^31040432 is an apocalyptic number.

It is an amenable number.

31040432 is an abundant number, since it is smaller than the sum of its proper divisors (31715968).

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

31040432 is a wasteful number, since it uses less digits than its factorization.

31040432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84380 (or 84374 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 31040432 is about 5571.3940804793. The cubic root of 31040432 is about 314.2745782752.

Adding to 31040432 its reverse (23404013), we get a palindrome (54444445).

The spelling of 31040432 in words is "thirty-one million, forty thousand, four hundred thirty-two".