3978882 has 28 divisors (see below), whose sum is σ = 8951670. Its totient is φ = 1325808.

The previous prime is 3978859. The next prime is 3978883. The reversal of 3978882 is 2888793.

3978882 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2368521 + 1610361 = 1539^2 + 1269^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (3978883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 94 + ... + 2822.

Almost surely, 2^3978882 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3978882, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4475835).

3978882 is an abundant number, since it is smaller than the sum of its proper divisors (4972788).

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

3978882 is an equidigital number, since it uses as much as digits as its factorization.

3978882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2749 (or 2734 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 3978882 is about 1994.7135132645. The cubic root of 3978882 is about 158.4602560011.

The spelling of 3978882 in words is "three million, nine hundred seventy-eight thousand, eight hundred eighty-two".