381807680 has 28 divisors (see below), whose sum is σ = 909180300. Its totient is φ = 152722944.

The previous prime is 381807667. The next prime is 381807689. The reversal of 381807680 is 86708183.

It can be written as a sum of positive squares in 2 ways, for example, as 200958976 + 180848704 = 14176^2 + 13448^2 .

It is not an unprimeable number, because it can be changed into a prime (381807689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 596255 + ... + 596894.

It is an arithmetic number, because the mean of its divisors is an integer number (32470725).

Almost surely, 2^381807680 is an apocalyptic number.

It is an amenable number.

381807680 is an abundant number, since it is smaller than the sum of its proper divisors (527372620).

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

381807680 is a wasteful number, since it uses less digits than its factorization.

381807680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193166 (or 1193156 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The square root of 381807680 is about 19539.8996926801. The cubic root of 381807680 is about 725.4623638075.

The spelling of 381807680 in words is "three hundred eighty-one million, eight hundred seven thousand, six hundred eighty".