31304404 has 6 divisors (see below), whose sum is σ = 54782714. Its totient is φ = 15652200.

The previous prime is 31304401. The next prime is 31304417. The reversal of 31304404 is 40440313.

It can be written as a sum of positive squares in only one way, i.e., 27060804 + 4243600 = 5202^2 + 2060^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31304401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3913047 + ... + 3913054.

Almost surely, 2^31304404 is an apocalyptic number.

It is an amenable number.

31304404 is a deficient number, since it is larger than the sum of its proper divisors (23478310).

31304404 is a wasteful number, since it uses less digits than its factorization.

31304404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7826105 (or 7826103 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 31304404 is about 5595.0338694238. The cubic root of 31304404 is about 315.1629424899.

Subtracting from 31304404 its product of nonzero digits (576), we obtain a triangular number (31303828 = T₇₉₁₂).

Adding to 31304404 its reverse (40440313), we get a palindrome (71744717).

The spelling of 31304404 in words is "thirty-one million, three hundred four thousand, four hundred four".