3977844 has 48 divisors (see below), whose sum is σ = 10245312. Its totient is φ = 1193472.

The previous prime is 3977819. The next prime is 3977849. The reversal of 3977844 is 4487793.

It is a junction number, because it is equal to n+sod(n) for n = 3977796 and 3977805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3977849) 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, 6412 + ... + 7004.

It is an arithmetic number, because the mean of its divisors is an integer number (213444).

Almost surely, 2^3977844 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 3977844, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5122656).

3977844 is an abundant number, since it is smaller than the sum of its proper divisors (6267468).

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

3977844 is a wasteful number, since it uses less digits than its factorization.

3977844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656 (or 654 counting only the distinct ones).

The product of its digits is 169344, while the sum is 42.

The square root of 3977844 is about 1994.4533085535. The cubic root of 3977844 is about 158.4464752413.

The spelling of 3977844 in words is "three million, nine hundred seventy-seven thousand, eight hundred forty-four".