31140404 has 12 divisors (see below), whose sum is σ = 54862500. Its totient is φ = 15465408.

The previous prime is 31140401. The next prime is 31140407. The reversal of 31140404 is 40404113.

It is an interprime number because it is at equal distance from previous prime (31140401) and next prime (31140407).

It can be written as a sum of positive squares in 2 ways, for example, as 1416100 + 29724304 = 1190^2 + 5452^2 .

It is a super-2 number, since 2×31140404² = 1939449522566432, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31140401) 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, 25529 + ... + 26720.

It is an arithmetic number, because the mean of its divisors is an integer number (4571875).

Almost surely, 2^31140404 is an apocalyptic number.

It is an amenable number.

31140404 is a deficient number, since it is larger than the sum of its proper divisors (23722096).

31140404 is a wasteful number, since it uses less digits than its factorization.

31140404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52402 (or 52400 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 31140404 is about 5580.3587698283. The cubic root of 31140404 is about 314.6116116893.

Adding to 31140404 its reverse (40404113), we get a palindrome (71544517).

The spelling of 31140404 in words is "thirty-one million, one hundred forty thousand, four hundred four".