3837981 has 16 divisors (see below), whose sum is σ = 6156800. Its totient is φ = 2077488.

The previous prime is 3837979. The next prime is 3837989. The reversal of 3837981 is 1897383.

It is not a de Polignac number, because 3837981 - 2¹ = 3837979 is a prime.

It is a super-2 number, since 2×3837981² = 29460196312722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3837989) 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, 4411 + ... + 5208.

It is an arithmetic number, because the mean of its divisors is an integer number (384800).

Almost surely, 2^3837981 is an apocalyptic number.

It is an amenable number.

3837981 is a deficient number, since it is larger than the sum of its proper divisors (2318819).

3837981 is a wasteful number, since it uses less digits than its factorization.

3837981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9648.

The product of its digits is 36288, while the sum is 39.

The square root of 3837981 is about 1959.0765681821. The cubic root of 3837981 is about 156.5672559820.

The spelling of 3837981 in words is "three million, eight hundred thirty-seven thousand, nine hundred eighty-one".