381728808 has 64 divisors (see below), whose sum is σ = 1062244800. Its totient is φ = 127016640.

The previous prime is 381728807. The next prime is 381728821. The reversal of 381728808 is 808827183.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (381728807) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 157123 + ... + 159533.

It is an arithmetic number, because the mean of its divisors is an integer number (16597575).

Almost surely, 2^381728808 is an apocalyptic number.

It is an amenable number.

381728808 is an abundant number, since it is smaller than the sum of its proper divisors (680515992).

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

381728808 is a wasteful number, since it uses less digits than its factorization.

381728808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159 (or 3149 counting only the distinct ones).

The product of its (nonzero) digits is 172032, while the sum is 45.

The square root of 381728808 is about 19537.8813590420. The cubic root of 381728808 is about 725.4124061884.

The spelling of 381728808 in words is "three hundred eighty-one million, seven hundred twenty-eight thousand, eight hundred eight".