381326380 has 24 divisors (see below), whose sum is σ = 801702720. Its totient is φ = 152355840.

The previous prime is 381326359. The next prime is 381326383. The reversal of 381326380 is 83623183.

It is not an unprimeable number, because it can be changed into a prime (381326383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7756 + ... + 28684.

It is an arithmetic number, because the mean of its divisors is an integer number (33404280).

Almost surely, 2^381326380 is an apocalyptic number.

It is an amenable number.

381326380 is an abundant number, since it is smaller than the sum of its proper divisors (420376340).

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

381326380 is a wasteful number, since it uses less digits than its factorization.

381326380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21849 (or 21847 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 381326380 is about 19527.5799831930. The cubic root of 381326380 is about 725.1574006250.

The spelling of 381326380 in words is "three hundred eighty-one million, three hundred twenty-six thousand, three hundred eighty".