393849216 has 80 divisors (see below), whose sum is σ = 1172119740. Its totient is φ = 131279616.

The previous prime is 393849199. The next prime is 393849221. The reversal of 393849216 is 612948393.

It is a happy number.

393849216 is a `hidden beast` number, since 393 + 8 + 49 + 216 = 666.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8626 + ... + 29361.

Almost surely, 2^393849216 is an apocalyptic number.

393849216 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

393849216 is an abundant number, since it is smaller than the sum of its proper divisors (778270524).

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

393849216 is an equidigital number, since it uses as much as digits as its factorization.

393849216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38013 (or 37992 counting only the distinct ones).

The product of its digits is 279936, while the sum is 45.

The square root of 393849216 is about 19845.6346837283. The cubic root of 393849216 is about 733.0101613675.

The spelling of 393849216 in words is "three hundred ninety-three million, eight hundred forty-nine thousand, two hundred sixteen".