3783256381 has 4 divisors (see below), whose sum is σ = 4005800892. Its totient is φ = 3560711872.

The previous prime is 3783256363. The next prime is 3783256397. The reversal of 3783256381 is 1836523873.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1836523873 = 1361 ⋅1349393.

It can be written as a sum of positive squares in 2 ways, for example, as 3446864100 + 336392281 = 58710^2 + 18341^2 .

It is a cyclic number.

It is not a de Polignac number, because 3783256381 - 2⁹ = 3783255869 is a prime.

It is a super-2 number, since 2×3783256381² = 28626057688754434322, 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 (3783206381) 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, 111272230 + ... + 111272263.

It is an arithmetic number, because the mean of its divisors is an integer number (1001450223).

Almost surely, 2^3783256381 is an apocalyptic number.

It is an amenable number.

3783256381 is a deficient number, since it is larger than the sum of its proper divisors (222544511).

3783256381 is a wasteful number, since it uses less digits than its factorization.

3783256381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222544510.

The product of its digits is 725760, while the sum is 46.

The square root of 3783256381 is about 61508.1814151581. The cubic root of 3783256381 is about 1558.1954233057.

The spelling of 3783256381 in words is "three billion, seven hundred eighty-three million, two hundred fifty-six thousand, three hundred eighty-one".