3881940 has 96 divisors (see below), whose sum is σ = 11854080. Its totient is φ = 946176.

The previous prime is 3881887. The next prime is 3881951. The reversal of 3881940 is 491883.

3881940 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39972 + ... + 40068.

It is an arithmetic number, because the mean of its divisors is an integer number (123480).

Almost surely, 2^3881940 is an apocalyptic number.

3881940 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3881940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5927040).

3881940 is an abundant number, since it is smaller than the sum of its proper divisors (7972140).

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

3881940 is a wasteful number, since it uses less digits than its factorization.

3881940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 3881940 is about 1970.2639417093. The cubic root of 3881940 is about 157.1627452200.

The spelling of 3881940 in words is "three million, eight hundred eighty-one thousand, nine hundred forty".