31382889 has 8 divisors (see below), whose sum is σ = 44046240. Its totient is φ = 19820736.

The previous prime is 31382863. The next prime is 31382891. The reversal of 31382889 is 98828313.

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

It is not a de Polignac number, because 31382889 - 2¹⁷ = 31251817 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 31382889.

It is not an unprimeable number, because it can be changed into a prime (31382809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 275232 + ... + 275345.

It is an arithmetic number, because the mean of its divisors is an integer number (5505780).

Almost surely, 2^31382889 is an apocalyptic number.

It is an amenable number.

31382889 is a deficient number, since it is larger than the sum of its proper divisors (12663351).

31382889 is a wasteful number, since it uses less digits than its factorization.

31382889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550599.

The product of its digits is 82944, while the sum is 42.

The square root of 31382889 is about 5602.0432879441. The cubic root of 31382889 is about 315.4261101507.

The spelling of 31382889 in words is "thirty-one million, three hundred eighty-two thousand, eight hundred eighty-nine".