31986234 has 96 divisors (see below), whose sum is σ = 86261760. Its totient is φ = 8359200.

The previous prime is 31986221. The next prime is 31986239. The reversal of 31986234 is 43268913.

It is not an unprimeable number, because it can be changed into a prime (31986239) 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 47 ways as a sum of consecutive naturals, for example, 73999 + ... + 74429.

It is an arithmetic number, because the mean of its divisors is an integer number (898560).

Almost surely, 2^31986234 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31986234, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43130880).

31986234 is an abundant number, since it is smaller than the sum of its proper divisors (54275526).

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

31986234 is a wasteful number, since it uses less digits than its factorization.

31986234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496 (or 493 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 31986234 is about 5655.6373646124. The cubic root of 31986234 is about 317.4346785246.

The spelling of 31986234 in words is "thirty-one million, nine hundred eighty-six thousand, two hundred thirty-four".