31040334 has 96 divisors (see below), whose sum is σ = 79803360. Its totient is φ = 8989056.

The previous prime is 31040329. The next prime is 31040369. The reversal of 31040334 is 43304013.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1825894 + ... + 1825910.

It is an arithmetic number, because the mean of its divisors is an integer number (831285).

Almost surely, 2^31040334 is an apocalyptic number.

31040334 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31040334, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39901680).

31040334 is an abundant number, since it is smaller than the sum of its proper divisors (48763026).

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

31040334 is an equidigital number, since it uses as much as digits as its factorization.

31040334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81 (or 35 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 31040334 is about 5571.3852855461. The cubic root of 31040334 is about 314.2742475352.

Adding to 31040334 its reverse (43304013), we get a palindrome (74344347).

The spelling of 31040334 in words is "thirty-one million, forty thousand, three hundred thirty-four".