380805860 has 36 divisors (see below), whose sum is σ = 826362684. Its totient is φ = 147401280.

The previous prime is 380805811. The next prime is 380805863. The reversal of 380805860 is 68508083.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 44009956 + 336795904 = 6634^2 + 18352^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380805863) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9314 + ... + 29126.

It is an arithmetic number, because the mean of its divisors is an integer number (22954519).

Almost surely, 2^380805860 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 380805860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (413181342).

380805860 is an abundant number, since it is smaller than the sum of its proper divisors (445556824).

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

380805860 is a wasteful number, since it uses less digits than its factorization.

380805860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19884 (or 19851 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 380805860 is about 19514.2476155244. The cubic root of 380805860 is about 724.8272977461.

The spelling of 380805860 in words is "three hundred eighty million, eight hundred five thousand, eight hundred sixty".