381966416 has 40 divisors (see below), whose sum is σ = 798178080. Its totient is φ = 176029056.

The previous prime is 381966401. The next prime is 381966449. The reversal of 381966416 is 614669183.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 241115 + ... + 242693.

It is an arithmetic number, because the mean of its divisors is an integer number (19954452).

Almost surely, 2^381966416 is an apocalyptic number.

It is an amenable number.

381966416 is an abundant number, since it is smaller than the sum of its proper divisors (416211664).

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

381966416 is a wasteful number, since it uses less digits than its factorization.

381966416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2763 (or 2757 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The square root of 381966416 is about 19543.9611133465. The cubic root of 381966416 is about 725.5628865268.

The spelling of 381966416 in words is "three hundred eighty-one million, nine hundred sixty-six thousand, four hundred sixteen".