381953216 has 14 divisors (see below), whose sum is σ = 757938540. Its totient is φ = 190976576.

The previous prime is 381953213. The next prime is 381953227. The reversal of 381953216 is 612359183.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 381953216.

It is not an unprimeable number, because it can be changed into a prime (381953213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2983946 + ... + 2984073.

Almost surely, 2^381953216 is an apocalyptic number.

It is an amenable number.

381953216 is a deficient number, since it is larger than the sum of its proper divisors (375985324).

381953216 is an equidigital number, since it uses as much as digits as its factorization.

381953216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5968031 (or 5968021 counting only the distinct ones).

The product of its digits is 38880, while the sum is 38.

The square root of 381953216 is about 19543.6234102072. The cubic root of 381953216 is about 725.5545284269.

The spelling of 381953216 in words is "three hundred eighty-one million, nine hundred fifty-three thousand, two hundred sixteen".