31134040 has 64 divisors (see below), whose sum is σ = 80559360. Its totient is φ = 10608000.

The previous prime is 31134017. The next prime is 31134043. The reversal of 31134040 is 4043113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31134043) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 70059 + ... + 70501.

It is an arithmetic number, because the mean of its divisors is an integer number (1258740).

Almost surely, 2^31134040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31134040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40279680).

31134040 is an abundant number, since it is smaller than the sum of its proper divisors (49425320).

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

31134040 is a wasteful number, since it uses less digits than its factorization.

31134040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712 (or 708 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 31134040 is about 5579.7885264587. The cubic root of 31134040 is about 314.5901783910.

Adding to 31134040 its reverse (4043113), we get a palindrome (35177153).

The spelling of 31134040 in words is "thirty-one million, one hundred thirty-four thousand, forty".