31434140 has 12 divisors (see below), whose sum is σ = 66011736. Its totient is φ = 12573648.

The previous prime is 31434107. The next prime is 31434149. The reversal of 31434140 is 4143413.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 1571707 = 31434140 / (3 + 1 + 4 + 3 + 4 + 1 + 4 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31434149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 785834 + ... + 785873.

It is an arithmetic number, because the mean of its divisors is an integer number (5500978).

Almost surely, 2^31434140 is an apocalyptic number.

It is an amenable number.

31434140 is an abundant number, since it is smaller than the sum of its proper divisors (34577596).

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

31434140 is a wasteful number, since it uses less digits than its factorization.

31434140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1571716 (or 1571714 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 31434140 is about 5606.6157350045. The cubic root of 31434140 is about 315.5977228984.

Adding to 31434140 its reverse (4143413), we get a palindrome (35577553).

The spelling of 31434140 in words is "thirty-one million, four hundred thirty-four thousand, one hundred forty".