31440014 has 16 divisors (see below), whose sum is σ = 48854400. Its totient is φ = 15158880.

The previous prime is 31440001. The next prime is 31440049. The reversal of 31440014 is 41004413.

It is a junction number, because it is equal to n+sod(n) for n = 31439974 and 31440001.

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 7 ways as a sum of consecutive naturals, for example, 20912 + ... + 22364.

It is an arithmetic number, because the mean of its divisors is an integer number (3053400).

Almost surely, 2^31440014 is an apocalyptic number.

31440014 is a deficient number, since it is larger than the sum of its proper divisors (17414386).

31440014 is a wasteful number, since it uses less digits than its factorization.

31440014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1835.

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

The square root of 31440014 is about 5607.1395559590. The cubic root of 31440014 is about 315.6173799291.

Adding to 31440014 its reverse (41004413), we get a palindrome (72444427).

The spelling of 31440014 in words is "thirty-one million, four hundred forty thousand, fourteen".