381138475 has 12 divisors (see below), whose sum is σ = 479088136. Its totient is φ = 300732480.

The previous prime is 381138473. The next prime is 381138481. The reversal of 381138475 is 574831183.

It is not a de Polignac number, because 381138475 - 2¹ = 381138473 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381138473) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102597 + ... + 106246.

Almost surely, 2^381138475 is an apocalyptic number.

381138475 is a deficient number, since it is larger than the sum of its proper divisors (97949661).

381138475 is a wasteful number, since it uses less digits than its factorization.

381138475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208926 (or 208921 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 381138475 is about 19522.7681182767. The cubic root of 381138475 is about 725.0382698784.

The spelling of 381138475 in words is "three hundred eighty-one million, one hundred thirty-eight thousand, four hundred seventy-five".