381656379 has 16 divisors (see below), whose sum is σ = 548479232. Its totient is φ = 234668448.

The previous prime is 381656351. The next prime is 381656383. The reversal of 381656379 is 973656183.

It is a happy number.

It is not a de Polignac number, because 381656379 - 2⁸ = 381656123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381656389) 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, 53052 + ... + 59814.

It is an arithmetic number, because the mean of its divisors is an integer number (34279952).

Almost surely, 2^381656379 is an apocalyptic number.

381656379 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

381656379 is a deficient number, since it is larger than the sum of its proper divisors (166822853).

381656379 is a wasteful number, since it uses less digits than its factorization.

381656379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8226.

The product of its digits is 816480, while the sum is 48.

The square root of 381656379 is about 19536.0277180393. The cubic root of 381656379 is about 725.3665235116.

It can be divided in two parts, 38165 and 6379, that added together give a palindrome (44544).

The spelling of 381656379 in words is "three hundred eighty-one million, six hundred fifty-six thousand, three hundred seventy-nine".