31838228 has 24 divisors (see below), whose sum is σ = 56612640. Its totient is φ = 15665760.

The previous prime is 31838221. The next prime is 31838239. The reversal of 31838228 is 82283813.

It is a happy number.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31838221) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 96023 + ... + 96353.

It is an arithmetic number, because the mean of its divisors is an integer number (2358860).

Almost surely, 2^31838228 is an apocalyptic number.

It is an amenable number.

31838228 is a deficient number, since it is larger than the sum of its proper divisors (24774412).

31838228 is a wasteful number, since it uses less digits than its factorization.

31838228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647 (or 645 counting only the distinct ones).

The product of its digits is 18432, while the sum is 35.

The square root of 31838228 is about 5642.5373724948. The cubic root of 31838228 is about 316.9443124821.

It can be divided in two parts, 3183 and 8228, that added together give a palindrome (11411).

The spelling of 31838228 in words is "thirty-one million, eight hundred thirty-eight thousand, two hundred twenty-eight".