381369445 has 8 divisors (see below), whose sum is σ = 459297144. Its totient is φ = 303993024.

The previous prime is 381369437. The next prime is 381369473. The reversal of 381369445 is 544963183.

It can be written as a sum of positive squares in 4 ways, for example, as 26687556 + 354681889 = 5166^2 + 18833^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 381369445 - 2³ = 381369437 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136294 + ... + 139063.

It is an arithmetic number, because the mean of its divisors is an integer number (57412143).

Almost surely, 2^381369445 is an apocalyptic number.

It is an amenable number.

381369445 is a deficient number, since it is larger than the sum of its proper divisors (77927699).

381369445 is a wasteful number, since it uses less digits than its factorization.

381369445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275639.

The product of its digits is 311040, while the sum is 43.

The square root of 381369445 is about 19528.6826232596. The cubic root of 381369445 is about 725.1846980877.

The spelling of 381369445 in words is "three hundred eighty-one million, three hundred sixty-nine thousand, four hundred forty-five".