31684104 has 48 divisors (see below), whose sum is σ = 86680620. Its totient is φ = 10454400.

The previous prime is 31684097. The next prime is 31684109. The reversal of 31684104 is 40148613.

It can be written as a sum of positive squares in 2 ways, for example, as 19448100 + 12236004 = 4410^2 + 3498^2 .

It is not an unprimeable number, because it can be changed into a prime (31684109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5094 + ... + 9450.

Almost surely, 2^31684104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31684104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43340310).

31684104 is an abundant number, since it is smaller than the sum of its proper divisors (54996516).

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

31684104 is a wasteful number, since it uses less digits than its factorization.

31684104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4470 (or 4463 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 31684104 is about 5628.8634732066. The cubic root of 31684104 is about 316.4320586703.

The spelling of 31684104 in words is "thirty-one million, six hundred eighty-four thousand, one hundred four".