381444438 has 16 divisors (see below), whose sum is σ = 764001216. Its totient is φ = 126962760.

The previous prime is 381444431. The next prime is 381444451. The reversal of 381444438 is 834444183.

It is a super-2 number, since 2×381444438² = 290999718562271688, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 381444396 and 381444405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381444431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41856 + ... + 50147.

It is an arithmetic number, because the mean of its divisors is an integer number (47750076).

Almost surely, 2^381444438 is an apocalyptic number.

381444438 is an abundant number, since it is smaller than the sum of its proper divisors (382556778).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

381444438 is a wasteful number, since it uses less digits than its factorization.

381444438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92699.

The product of its digits is 147456, while the sum is 39.

The square root of 381444438 is about 19530.6026020704. The cubic root of 381444438 is about 725.2322287368.

The spelling of 381444438 in words is "three hundred eighty-one million, four hundred forty-four thousand, four hundred thirty-eight".