31020304 has 40 divisors (see below), whose sum is σ = 69380480. Its totient is φ = 13160448.

The previous prime is 31020289. The next prime is 31020361. The reversal of 31020304 is 40302013.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10192 + ... + 12880.

It is an arithmetic number, because the mean of its divisors is an integer number (1734512).

Almost surely, 2^31020304 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 31020304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34690240).

31020304 is an abundant number, since it is smaller than the sum of its proper divisors (38360176).

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

31020304 is a wasteful number, since it uses less digits than its factorization.

31020304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2807 (or 2801 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 31020304 is about 5569.5874173946. The cubic root of 31020304 is about 314.2066337044.

Adding to 31020304 its reverse (40302013), we get a palindrome (71322317).

The spelling of 31020304 in words is "thirty-one million, twenty thousand, three hundred four".