31204004 has 24 divisors (see below), whose sum is σ = 61904640. Its totient is φ = 13643424.

The previous prime is 31203989. The next prime is 31204007. The reversal of 31204004 is 40040213.

It is a self number, because there is not a number n which added to its sum of digits gives 31204004.

It is not an unprimeable number, because it can be changed into a prime (31204007) by changing a digit.

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, 14804 + ... + 16779.

It is an arithmetic number, because the mean of its divisors is an integer number (2579360).

Almost surely, 2^31204004 is an apocalyptic number.

It is an amenable number.

31204004 is a deficient number, since it is larger than the sum of its proper divisors (30700636).

31204004 is a wasteful number, since it uses less digits than its factorization.

31204004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31619 (or 31617 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 31204004 is about 5586.0544215036. The cubic root of 31204004 is about 314.8256497159.

Adding to 31204004 its reverse (40040213), we get a palindrome (71244217).

The spelling of 31204004 in words is "thirty-one million, two hundred four thousand, four".