31994438 has 8 divisors (see below), whose sum is σ = 54847632. Its totient is φ = 13711896.

The previous prime is 31994429. The next prime is 31994483. The reversal of 31994438 is 83449913.

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

It is a junction number, because it is equal to n+sod(n) for n = 31994395 and 31994404.

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 3 ways as a sum of consecutive naturals, for example, 1142645 + ... + 1142672.

It is an arithmetic number, because the mean of its divisors is an integer number (6855954).

Almost surely, 2^31994438 is an apocalyptic number.

31994438 is a deficient number, since it is larger than the sum of its proper divisors (22853194).

31994438 is a wasteful number, since it uses less digits than its factorization.

31994438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2285326.

The product of its digits is 93312, while the sum is 41.

The square root of 31994438 is about 5656.3626121387. The cubic root of 31994438 is about 317.4618153181.

The spelling of 31994438 in words is "thirty-one million, nine hundred ninety-four thousand, four hundred thirty-eight".