31409118 has 24 divisors (see below), whose sum is σ = 73288488. Its totient is φ = 9664272.

The previous prime is 31409087. The next prime is 31409167. The reversal of 31409118 is 81190413.

It is a junction number, because it is equal to n+sod(n) for n = 31409091 and 31409100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66880 + ... + 67347.

It is an arithmetic number, because the mean of its divisors is an integer number (3053687).

Almost surely, 2^31409118 is an apocalyptic number.

31409118 is an abundant number, since it is smaller than the sum of its proper divisors (41879370).

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

31409118 is a wasteful number, since it uses less digits than its factorization.

31409118 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134248 (or 134245 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 31409118 is about 5604.3838198325. The cubic root of 31409118 is about 315.5139606525.

The spelling of 31409118 in words is "thirty-one million, four hundred nine thousand, one hundred eighteen".