381881049 has 32 divisors (see below), whose sum is σ = 564255744. Its totient is φ = 227810880.

The previous prime is 381881041. The next prime is 381881051. The reversal of 381881049 is 940188183.

It is not a de Polignac number, because 381881049 - 2³ = 381881041 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 381881049.

It is not an unprimeable number, because it can be changed into a prime (381881041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 961719 + ... + 962115.

It is an arithmetic number, because the mean of its divisors is an integer number (17632992).

Almost surely, 2^381881049 is an apocalyptic number.

It is an amenable number.

381881049 is a deficient number, since it is larger than the sum of its proper divisors (182374695).

381881049 is a wasteful number, since it uses less digits than its factorization.

381881049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797.

The product of its (nonzero) digits is 55296, while the sum is 42.

The square root of 381881049 is about 19541.7770174567. Note that the first 3 decimals coincide. The cubic root of 381881049 is about 725.5088296436.

The spelling of 381881049 in words is "three hundred eighty-one million, eight hundred eighty-one thousand, forty-nine".