31849956 has 48 divisors (see below), whose sum is σ = 83641600. Its totient is φ = 10479456.

The previous prime is 31849931. The next prime is 31849957. The reversal of 31849956 is 65994813.

It is a happy number.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (31849957) 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 15 ways as a sum of consecutive naturals, for example, 6666 + ... + 10398.

Almost surely, 2^31849956 is an apocalyptic number.

31849956 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31849956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41820800).

31849956 is an abundant number, since it is smaller than the sum of its proper divisors (51791644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31849956 is a wasteful number, since it uses less digits than its factorization.

31849956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3825 (or 3817 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 31849956 is about 5643.5765255731. The cubic root of 31849956 is about 316.9832244736.

The spelling of 31849956 in words is "thirty-one million, eight hundred forty-nine thousand, nine hundred fifty-six".