3839781 has 16 divisors (see below), whose sum is σ = 5829120. Its totient is φ = 2225520.

The previous prime is 3839777. The next prime is 3839783. The reversal of 3839781 is 1879383.

It is not a de Polignac number, because 3839781 - 2² = 3839777 is a prime.

It is a super-2 number, since 2×3839781² = 29487836255922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3839783) 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, 1771 + ... + 3288.

It is an arithmetic number, because the mean of its divisors is an integer number (364320).

Almost surely, 2^3839781 is an apocalyptic number.

It is an amenable number.

3839781 is a deficient number, since it is larger than the sum of its proper divisors (1989339).

3839781 is a wasteful number, since it uses less digits than its factorization.

3839781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5096.

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

The square root of 3839781 is about 1959.5359144451. The cubic root of 3839781 is about 156.5917286596.

The spelling of 3839781 in words is "three million, eight hundred thirty-nine thousand, seven hundred eighty-one".