381681782 has 8 divisors (see below), whose sum is σ = 572871936. Its totient is φ = 190724472.

The previous prime is 381681763. The next prime is 381681791. The reversal of 381681782 is 287186183.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54053 + ... + 60704.

It is an arithmetic number, because the mean of its divisors is an integer number (71608992).

Almost surely, 2^381681782 is an apocalyptic number.

381681782 is a deficient number, since it is larger than the sum of its proper divisors (191190154).

381681782 is a wasteful number, since it uses less digits than its factorization.

381681782 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116422.

The product of its digits is 129024, while the sum is 44.

The square root of 381681782 is about 19536.6778649800. The cubic root of 381681782 is about 725.3826165891.

The spelling of 381681782 in words is "three hundred eighty-one million, six hundred eighty-one thousand, seven hundred eighty-two".