3846781 has 4 divisors (see below), whose sum is σ = 3850812. Its totient is φ = 3842752.

The previous prime is 3846769. The next prime is 3846833. The reversal of 3846781 is 1876483.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1876483 = 7 ⋅268069.

It can be written as a sum of positive squares in 2 ways, for example, as 1071225 + 2775556 = 1035^2 + 1666^2 .

It is a cyclic number.

It is not a de Polignac number, because 3846781 - 2⁷ = 3846653 is a prime.

It is a super-2 number, since 2×3846781² = 29595448123922, which contains 22 as substring.

It is a Duffinian number.

3846781 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 3846781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3846701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315 + ... + 2791.

It is an arithmetic number, because the mean of its divisors is an integer number (962703).

Almost surely, 2^3846781 is an apocalyptic number.

It is an amenable number.

3846781 is a deficient number, since it is larger than the sum of its proper divisors (4031).

3846781 is a wasteful number, since it uses less digits than its factorization.

3846781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4030.

The product of its digits is 32256, while the sum is 37.

The square root of 3846781 is about 1961.3212383493. The cubic root of 3846781 is about 156.6868275448.

The spelling of 3846781 in words is "three million, eight hundred forty-six thousand, seven hundred eighty-one".