3981208 has 64 divisors (see below), whose sum is σ = 9745920. Its totient is φ = 1478400.

The previous prime is 3981193. The next prime is 3981209. The reversal of 3981208 is 8021893.

3981208 = T₇ + T₈ + ... + T₂₈₇.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 3981208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3981209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14028 + ... + 14308.

It is an arithmetic number, because the mean of its divisors is an integer number (152280).

Almost surely, 2^3981208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3981208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4872960).

3981208 is an abundant number, since it is smaller than the sum of its proper divisors (5764712).

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

3981208 is a wasteful number, since it uses less digits than its factorization.

3981208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328 (or 324 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 3981208 is about 1995.2964691995. The cubic root of 3981208 is about 158.4911278856.

The spelling of 3981208 in words is "three million, nine hundred eighty-one thousand, two hundred eight".