31834140 has 48 divisors (see below), whose sum is σ = 95994528. Its totient is φ = 7835904.

The previous prime is 31834129. The next prime is 31834151. The reversal of 31834140 is 4143813.

It is an interprime number because it is at equal distance from previous prime (31834129) and next prime (31834151).

It is a self number, because there is not a number n which added to its sum of digits gives 31834140.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19627 + ... + 21186.

It is an arithmetic number, because the mean of its divisors is an integer number (1999886).

Almost surely, 2^31834140 is an apocalyptic number.

31834140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31834140 is an abundant number, since it is smaller than the sum of its proper divisors (64160388).

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

31834140 is a wasteful number, since it uses less digits than its factorization.

31834140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40838 (or 40836 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 31834140 is about 5642.1751124899. The cubic root of 31834140 is about 316.9307467793.

Adding to 31834140 its reverse (4143813), we get a palindrome (35977953).

The spelling of 31834140 in words is "thirty-one million, eight hundred thirty-four thousand, one hundred forty".