31040404 has 12 divisors (see below), whose sum is σ = 55346004. Its totient is φ = 15227264.

The previous prime is 31040381. The next prime is 31040407. The reversal of 31040404 is 40404013.

It can be written as a sum of positive squares in 2 ways, for example, as 24800400 + 6240004 = 4980^2 + 2498^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31040407) by changing a digit.

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, 72997 + ... + 73420.

It is an arithmetic number, because the mean of its divisors is an integer number (4612167).

Almost surely, 2^31040404 is an apocalyptic number.

It is an amenable number.

31040404 is a deficient number, since it is larger than the sum of its proper divisors (24305600).

31040404 is a wasteful number, since it uses less digits than its factorization.

31040404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146474 (or 146472 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 31040404 is about 5571.3915676427. The cubic root of 31040404 is about 314.2744837782.

Adding to 31040404 its reverse (40404013), we get a palindrome (71444417).

The spelling of 31040404 in words is "thirty-one million, forty thousand, four hundred four".