3957786 has 48 divisors (see below), whose sum is σ = 9929088. Its totient is φ = 1116000.

The previous prime is 3957781. The next prime is 3957799. The reversal of 3957786 is 6877593.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3957781) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12571 + ... + 12881.

It is an arithmetic number, because the mean of its divisors is an integer number (206856).

Almost surely, 2^3957786 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3957786, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4964544).

3957786 is an abundant number, since it is smaller than the sum of its proper divisors (5971302).

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

3957786 is a wasteful number, since it uses less digits than its factorization.

3957786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427 (or 424 counting only the distinct ones).

The product of its digits is 317520, while the sum is 45.

The square root of 3957786 is about 1989.4185080068. The cubic root of 3957786 is about 158.1797079313.

The spelling of 3957786 in words is "three million, nine hundred fifty-seven thousand, seven hundred eighty-six".