381488845 has 4 divisors (see below), whose sum is σ = 457786620. Its totient is φ = 305191072.

The previous prime is 381488839. The next prime is 381488851. The reversal of 381488845 is 548884183.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (381488839) and next prime (381488851).

It can be written as a sum of positive squares in 2 ways, for example, as 242767561 + 138721284 = 15581^2 + 11778^2 .

It is a cyclic number.

It is not a de Polignac number, because 381488845 - 2⁷ = 381488717 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 38148880 + ... + 38148889.

It is an arithmetic number, because the mean of its divisors is an integer number (114446655).

Almost surely, 2^381488845 is an apocalyptic number.

It is an amenable number.

381488845 is a deficient number, since it is larger than the sum of its proper divisors (76297775).

381488845 is an equidigital number, since it uses as much as digits as its factorization.

381488845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76297774.

The product of its digits is 983040, while the sum is 49.

The square root of 381488845 is about 19531.7394258678. The cubic root of 381488845 is about 725.2603710075.

The spelling of 381488845 in words is "three hundred eighty-one million, four hundred eighty-eight thousand, eight hundred forty-five".