31044140 has 12 divisors (see below), whose sum is σ = 65192736. Its totient is φ = 12417648.

The previous prime is 31044137. The next prime is 31044173. The reversal of 31044140 is 4144013.

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 3 ways as a sum of consecutive naturals, for example, 776084 + ... + 776123.

It is an arithmetic number, because the mean of its divisors is an integer number (5432728).

Almost surely, 2^31044140 is an apocalyptic number.

It is an amenable number.

31044140 is an abundant number, since it is smaller than the sum of its proper divisors (34148596).

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

31044140 is a wasteful number, since it uses less digits than its factorization.

31044140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552216 (or 1552214 counting only the distinct ones).

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

The square root of 31044140 is about 5571.7268418328. The cubic root of 31044140 is about 314.2870918869.

Adding to 31044140 its reverse (4144013), we get a palindrome (35188153).

The spelling of 31044140 in words is "thirty-one million, forty-four thousand, one hundred forty".