31440134 has 8 divisors (see below), whose sum is σ = 51447528. Its totient is φ = 14290960.

The previous prime is 31440127. The next prime is 31440161. The reversal of 31440134 is 43104413.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 714527 + ... + 714570.

It is an arithmetic number, because the mean of its divisors is an integer number (6430941).

Almost surely, 2^31440134 is an apocalyptic number.

31440134 is a deficient number, since it is larger than the sum of its proper divisors (20007394).

31440134 is a wasteful number, since it uses less digits than its factorization.

31440134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1429110.

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

The square root of 31440134 is about 5607.1502565920. The cubic root of 31440134 is about 315.6177814772.

Adding to 31440134 its reverse (43104413), we get a palindrome (74544547).

The spelling of 31440134 in words is "thirty-one million, four hundred forty thousand, one hundred thirty-four".