3191998 has 8 divisors (see below), whose sum is σ = 4853808. Its totient is φ = 1574064.

The previous prime is 3191987. The next prime is 3191999. The reversal of 3191998 is 8991913.

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

It is a self number, because there is not a number n which added to its sum of digits gives 3191998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3191999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10786 + ... + 11077.

It is an arithmetic number, because the mean of its divisors is an integer number (606726).

Almost surely, 2^3191998 is an apocalyptic number.

3191998 is a deficient number, since it is larger than the sum of its proper divisors (1661810).

3191998 is a wasteful number, since it uses less digits than its factorization.

3191998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21938.

The product of its digits is 17496, while the sum is 40.

The square root of 3191998 is about 1786.6163550130. The cubic root of 3191998 is about 147.2383256675.

It can be divided in two parts, 31 and 91998, that added together give a palindrome (92029).

The spelling of 3191998 in words is "three million, one hundred ninety-one thousand, nine hundred ninety-eight".