381966415 has 16 divisors (see below), whose sum is σ = 473776128. Its totient is φ = 295453216.

The previous prime is 381966401. The next prime is 381966449. The reversal of 381966415 is 514669183.

It is a cyclic number.

It is not a de Polignac number, because 381966415 - 2⁵ = 381966383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9714 + ... + 29296.

It is an arithmetic number, because the mean of its divisors is an integer number (29611008).

Almost surely, 2^381966415 is an apocalyptic number.

381966415 is a deficient number, since it is larger than the sum of its proper divisors (91809713).

381966415 is a wasteful number, since it uses less digits than its factorization.

381966415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19718.

The product of its digits is 155520, while the sum is 43.

The square root of 381966415 is about 19543.9610877631. The cubic root of 381966415 is about 725.5628858936.

The spelling of 381966415 in words is "three hundred eighty-one million, nine hundred sixty-six thousand, four hundred fifteen".