31826138 has 8 divisors (see below), whose sum is σ = 47982132. Its totient is φ = 15832096.

The previous prime is 31826117. The next prime is 31826141. The reversal of 31826138 is 83162813.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19386409 + 12439729 = 4403^2 + 3527^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39995 + ... + 40782.

Almost surely, 2^31826138 is an apocalyptic number.

31826138 is a deficient number, since it is larger than the sum of its proper divisors (16155994).

31826138 is a wasteful number, since it uses less digits than its factorization.

31826138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80976.

The product of its digits is 6912, while the sum is 32.

The square root of 31826138 is about 5641.4659442383. The cubic root of 31826138 is about 316.9041894171.

The spelling of 31826138 in words is "thirty-one million, eight hundred twenty-six thousand, one hundred thirty-eight".