3967998 has 16 divisors (see below), whose sum is σ = 8353920. Its totient is φ = 1253016.

The previous prime is 3967993. The next prime is 3968009. The reversal of 3967998 is 8997693.

It is a self number, because there is not a number n which added to its sum of digits gives 3967998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3967993) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17290 + ... + 17517.

It is an arithmetic number, because the mean of its divisors is an integer number (522120).

Almost surely, 2^3967998 is an apocalyptic number.

3967998 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3967998 is an abundant number, since it is smaller than the sum of its proper divisors (4385922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3967998 is a wasteful number, since it uses less digits than its factorization.

3967998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34831.

The product of its digits is 734832, while the sum is 51.

The square root of 3967998 is about 1991.9834336661. The cubic root of 3967998 is about 158.3156377885.

The spelling of 3967998 in words is "three million, nine hundred sixty-seven thousand, nine hundred ninety-eight".