381812886 has 64 divisors (see below), whose sum is σ = 1044288000. Its totient is φ = 100696608.

The previous prime is 381812881. The next prime is 381812887. The reversal of 381812886 is 688218183.

381812886 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381812881) 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, 33936 + ... + 43763.

It is an arithmetic number, because the mean of its divisors is an integer number (16317000).

Almost surely, 2^381812886 is an apocalyptic number.

381812886 is an abundant number, since it is smaller than the sum of its proper divisors (662475114).

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

381812886 is a wasteful number, since it uses less digits than its factorization.

381812886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77730 (or 77724 counting only the distinct ones).

The product of its digits is 147456, while the sum is 45.

The square root of 381812886 is about 19540.0329068300. The cubic root of 381812886 is about 725.4656610521.

The spelling of 381812886 in words is "three hundred eighty-one million, eight hundred twelve thousand, eight hundred eighty-six".