3826781 has 4 divisors (see below), whose sum is σ = 4373472. Its totient is φ = 3280092.

The previous prime is 3826777. The next prime is 3826843. The reversal of 3826781 is 1876283.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1876283 = 41 ⋅45763.

It is a cyclic number.

It is not a de Polignac number, because 3826781 - 2² = 3826777 is a prime.

It is a super-2 number, since 2×3826781² = 29288505643922, 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 (3826721) 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, 273335 + ... + 273348.

It is an arithmetic number, because the mean of its divisors is an integer number (1093368).

Almost surely, 2^3826781 is an apocalyptic number.

It is an amenable number.

3826781 is a deficient number, since it is larger than the sum of its proper divisors (546691).

3826781 is an equidigital number, since it uses as much as digits as its factorization.

3826781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 546690.

The product of its digits is 16128, while the sum is 35.

The square root of 3826781 is about 1956.2159901197. The cubic root of 3826781 is about 156.4148093546.

The spelling of 3826781 in words is "three million, eight hundred twenty-six thousand, seven hundred eighty-one".