381920312 has 8 divisors (see below), whose sum is σ = 716100600. Its totient is φ = 190960152.

The previous prime is 381920293. The next prime is 381920321. The reversal of 381920312 is 213029183.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23870012 + ... + 23870027.

It is an arithmetic number, because the mean of its divisors is an integer number (89512575).

Almost surely, 2^381920312 is an apocalyptic number.

It is an amenable number.

381920312 is a deficient number, since it is larger than the sum of its proper divisors (334180288).

381920312 is a wasteful number, since it uses less digits than its factorization.

381920312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47740045 (or 47740041 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 381920312 is about 19542.7815829784. The cubic root of 381920312 is about 725.5336931249.

Adding to 381920312 its reverse (213029183), we get a palindrome (594949495).

The spelling of 381920312 in words is "three hundred eighty-one million, nine hundred twenty thousand, three hundred twelve".