381563874 has 48 divisors (see below), whose sum is σ = 838094400. Its totient is φ = 125450208.

The previous prime is 381563839. The next prime is 381563881. The reversal of 381563874 is 478365183.

381563874 is a `hidden beast` number, since 3 + 8 + 1 + 5 + 638 + 7 + 4 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Curzon 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 23 ways as a sum of consecutive naturals, for example, 861097 + ... + 861539.

It is an arithmetic number, because the mean of its divisors is an integer number (17460300).

Almost surely, 2^381563874 is an apocalyptic number.

381563874 is an abundant number, since it is smaller than the sum of its proper divisors (456530526).

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

381563874 is a wasteful number, since it uses less digits than its factorization.

381563874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999 (or 996 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 381563874 is about 19533.6600257095. The cubic root of 381563874 is about 725.3079145500.

The spelling of 381563874 in words is "three hundred eighty-one million, five hundred sixty-three thousand, eight hundred seventy-four".