31032004 has 12 divisors (see below), whose sum is σ = 57500604. Its totient is φ = 14603264.

The previous prime is 31031989. The next prime is 31032017. The reversal of 31032004 is 40023013.

It can be written as a sum of positive squares in 2 ways, for example, as 13307904 + 17724100 = 3648^2 + 4210^2 .

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 3 ways as a sum of consecutive naturals, for example, 228109 + ... + 228244.

It is an arithmetic number, because the mean of its divisors is an integer number (4791717).

Almost surely, 2^31032004 is an apocalyptic number.

31032004 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

31032004 is a deficient number, since it is larger than the sum of its proper divisors (26468600).

31032004 is a wasteful number, since it uses less digits than its factorization.

31032004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456374 (or 456372 counting only the distinct ones).

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

The square root of 31032004 is about 5570.6376654742. The cubic root of 31032004 is about 314.2461320871.

Adding to 31032004 its reverse (40023013), we get a palindrome (71055017).

The spelling of 31032004 in words is "thirty-one million, thirty-two thousand, four".