3981798 has 28 divisors (see below), whose sum is σ = 8958228. Its totient is φ = 1326780.

The previous prime is 3981767. The next prime is 3981821. The reversal of 3981798 is 8971893.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 93 + ... + 2823.

Almost surely, 2^3981798 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3981798, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4479114).

3981798 is an abundant number, since it is smaller than the sum of its proper divisors (4976430).

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

3981798 is an equidigital number, since it uses as much as digits as its factorization.

3981798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2751 (or 2736 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 3981798 is about 1995.4443114254. Note that the first 3 decimals coincide. The cubic root of 3981798 is about 158.4989567612.

The spelling of 3981798 in words is "three million, nine hundred eighty-one thousand, seven hundred ninety-eight".