31118406 has 32 divisors (see below), whose sum is σ = 69735168. Its totient is φ = 9174240.

The previous prime is 31118387. The next prime is 31118419. The reversal of 31118406 is 60481113.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 3930 + ... + 8813.

It is an arithmetic number, because the mean of its divisors is an integer number (2179224).

Almost surely, 2^31118406 is an apocalyptic number.

31118406 is an abundant number, since it is smaller than the sum of its proper divisors (38616762).

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

31118406 is a wasteful number, since it uses less digits than its factorization.

31118406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12796.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 31118406 is about 5578.3874013912. The cubic root of 31118406 is about 314.5375122810.

Adding to 31118406 its reverse (60481113), we get a palindrome (91599519).

The spelling of 31118406 in words is "thirty-one million, one hundred eighteen thousand, four hundred six".