3885391381 has 4 divisors (see below), whose sum is σ = 3890023200. Its totient is φ = 3880759564.

The previous prime is 3885391379. The next prime is 3885391421. The reversal of 3885391381 is 1831935883.

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.

It is a cyclic number.

It is not a de Polignac number, because 3885391381 - 2¹ = 3885391379 is a prime.

It is a super-2 number, since 2×3885391381² = 30192532367098174322, 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 (3885391331) 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, 2314651 + ... + 2316328.

It is an arithmetic number, because the mean of its divisors is an integer number (972505800).

Almost surely, 2^3885391381 is an apocalyptic number.

It is an amenable number.

3885391381 is a deficient number, since it is larger than the sum of its proper divisors (4631819).

3885391381 is an equidigital number, since it uses as much as digits as its factorization.

3885391381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4631818.

The product of its digits is 622080, while the sum is 49.

The square root of 3885391381 is about 62332.9076892776. The cubic root of 3885391381 is about 1572.0930852223.

The spelling of 3885391381 in words is "three billion, eight hundred eighty-five million, three hundred ninety-one thousand, three hundred eighty-one".