31934140 has 48 divisors (see below), whose sum is σ = 76995072. Its totient is φ = 10898496.

The previous prime is 31934131. The next prime is 31934141. The reversal of 31934140 is 4143913.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31934141) 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, 42609 + ... + 43351.

It is an arithmetic number, because the mean of its divisors is an integer number (1604064).

Almost surely, 2^31934140 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 31934140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38497536).

31934140 is an abundant number, since it is smaller than the sum of its proper divisors (45060932).

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

31934140 is a wasteful number, since it uses less digits than its factorization.

31934140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066 (or 1064 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 31934140 is about 5651.0299946116. The cubic root of 31934140 is about 317.2622561468.

The spelling of 31934140 in words is "thirty-one million, nine hundred thirty-four thousand, one hundred forty".