31004386 has 8 divisors (see below), whose sum is σ = 53150400. Its totient is φ = 13287588.

The previous prime is 31004353. The next prime is 31004387. The reversal of 31004386 is 68340013.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×31004386² = 1922543902473992, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31004386.

It is not an unprimeable number, because it can be changed into a prime (31004387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1107286 + ... + 1107313.

It is an arithmetic number, because the mean of its divisors is an integer number (6643800).

Almost surely, 2^31004386 is an apocalyptic number.

31004386 is a deficient number, since it is larger than the sum of its proper divisors (22146014).

31004386 is a wasteful number, since it uses less digits than its factorization.

31004386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2214608.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 31004386 is about 5568.1582233266. The cubic root of 31004386 is about 314.1528796970.

Adding to 31004386 its reverse (68340013), we get a palindrome (99344399).

The spelling of 31004386 in words is "thirty-one million, four thousand, three hundred eighty-six".