31140234 has 16 divisors (see below), whose sum is σ = 69200640. Its totient is φ = 10380060.

The previous prime is 31140233. The next prime is 31140251. The reversal of 31140234 is 43204113.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (31140233) 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 7 ways as a sum of consecutive naturals, for example, 288282 + ... + 288389.

It is an arithmetic number, because the mean of its divisors is an integer number (4325040).

Almost surely, 2^31140234 is an apocalyptic number.

31140234 is an abundant number, since it is smaller than the sum of its proper divisors (38060406).

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

31140234 is a wasteful number, since it uses less digits than its factorization.

31140234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576682 (or 576676 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 31140234 is about 5580.3435378120. The cubic root of 31140234 is about 314.6110391847.

Adding to 31140234 its reverse (43204113), we get a palindrome (74344347).

The spelling of 31140234 in words is "thirty-one million, one hundred forty thousand, two hundred thirty-four".