381545886 has 16 divisors (see below), whose sum is σ = 764999568. Its totient is φ = 126864000.

The previous prime is 381545881. The next prime is 381545893. The reversal of 381545886 is 688545183.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381545881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76885 + ... + 81696.

It is an arithmetic number, because the mean of its divisors is an integer number (47812473).

Almost surely, 2^381545886 is an apocalyptic number.

381545886 is an abundant number, since it is smaller than the sum of its proper divisors (383453682).

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

381545886 is a wasteful number, since it uses less digits than its factorization.

381545886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158987.

The product of its digits is 921600, while the sum is 48.

The square root of 381545886 is about 19533.1995842975. The cubic root of 381545886 is about 725.2965166822.

The spelling of 381545886 in words is "three hundred eighty-one million, five hundred forty-five thousand, eight hundred eighty-six".