3838155399 has 24 divisors (see below), whose sum is σ = 6321670992. Its totient is φ = 2223002880.

The previous prime is 3838155389. The next prime is 3838155403. The reversal of 3838155399 is 9935518383.

It is a happy number.

3838155399 is a `hidden beast` number, since 3 + 8 + 3 + 81 + 553 + 9 + 9 = 666.

3838155399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 3838155399 - 2¹¹ = 3838153351 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3838155389) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 962857 + ... + 966834.

It is an arithmetic number, because the mean of its divisors is an integer number (263402958).

Almost surely, 2^3838155399 is an apocalyptic number.

3838155399 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

3838155399 is a deficient number, since it is larger than the sum of its proper divisors (2483515593).

3838155399 is a wasteful number, since it uses less digits than its factorization.

3838155399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1929727 (or 1929724 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 54.

The square root of 3838155399 is about 61952.8481911849. The cubic root of 3838155399 is about 1565.6962743366.

The spelling of 3838155399 in words is "three billion, eight hundred thirty-eight million, one hundred fifty-five thousand, three hundred ninety-nine".