3991198 has 8 divisors (see below), whose sum is σ = 6005880. Its totient is φ = 1989240.

The previous prime is 3991189. The next prime is 3991199. The reversal of 3991198 is 8911993.

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

It is a super-2 number, since 2×3991198² = 31859322950408, which contains 22 as substring.

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 3991198.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3991199) 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, 2353 + ... + 3676.

It is an arithmetic number, because the mean of its divisors is an integer number (750735).

Almost surely, 2^3991198 is an apocalyptic number.

3991198 is a deficient number, since it is larger than the sum of its proper divisors (2014682).

3991198 is a wasteful number, since it uses less digits than its factorization.

3991198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6362.

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

The square root of 3991198 is about 1997.7982881162. The cubic root of 3991198 is about 158.6235838194.

The spelling of 3991198 in words is "three million, nine hundred ninety-one thousand, one hundred ninety-eight".