31438394 has 24 divisors (see below), whose sum is σ = 52176960. Its totient is φ = 14194128.

The previous prime is 31438387. The next prime is 31438397. The reversal of 31438394 is 49383413.

It is not an unprimeable number, because it can be changed into a prime (31438397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14897 + ... + 16875.

It is an arithmetic number, because the mean of its divisors is an integer number (2174040).

Almost surely, 2^31438394 is an apocalyptic number.

31438394 is a deficient number, since it is larger than the sum of its proper divisors (20738566).

31438394 is a wasteful number, since it uses less digits than its factorization.

31438394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2054 (or 2041 counting only the distinct ones).

The product of its digits is 31104, while the sum is 35.

The square root of 31438394 is about 5606.9950954143. The cubic root of 31438394 is about 315.6119589292.

The spelling of 31438394 in words is "thirty-one million, four hundred thirty-eight thousand, three hundred ninety-four".