381844355 has 4 divisors (see below), whose sum is σ = 458213232. Its totient is φ = 305475480.

The previous prime is 381844313. The next prime is 381844369. The reversal of 381844355 is 553448183.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 553448183 = 37 ⋅14958059.

It is not a de Polignac number, because 381844355 - 2⁶ = 381844291 is a prime.

It is a super-2 number, since 2×381844355² = 291610222890732050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38184431 + ... + 38184440.

It is an arithmetic number, because the mean of its divisors is an integer number (114553308).

Almost surely, 2^381844355 is an apocalyptic number.

381844355 is a deficient number, since it is larger than the sum of its proper divisors (76368877).

381844355 is an equidigital number, since it uses as much as digits as its factorization.

381844355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76368876.

The product of its digits is 230400, while the sum is 41.

The square root of 381844355 is about 19540.8381345325. The cubic root of 381844355 is about 725.4855914531.

The spelling of 381844355 in words is "three hundred eighty-one million, eight hundred forty-four thousand, three hundred fifty-five".