31304104 has 48 divisors (see below), whose sum is σ = 66194100. Its totient is φ = 13795584.

The previous prime is 31304029. The next prime is 31304107. The reversal of 31304104 is 40140313.

It can be written as a sum of positive squares in 2 ways, for example, as 27019204 + 4284900 = 5198^2 + 2070^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31304107) 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, 54732 + ... + 55300.

Almost surely, 2^31304104 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 31304104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33097050).

31304104 is an abundant number, since it is smaller than the sum of its proper divisors (34889996).

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

31304104 is a wasteful number, since it uses less digits than its factorization.

31304104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634 (or 607 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 31304104 is about 5595.0070598704. The cubic root of 31304104 is about 315.1619357180.

Adding to 31304104 its reverse (40140313), we get a palindrome (71444417).

The spelling of 31304104 in words is "thirty-one million, three hundred four thousand, one hundred four".