380561865 has 16 divisors (see below), whose sum is σ = 609237888. Its totient is φ = 202853376.

The previous prime is 380561861. The next prime is 380561869. The reversal of 380561865 is 568165083.

It is an interprime number because it is at equal distance from previous prime (380561861) and next prime (380561869).

It is not a de Polignac number, because 380561865 - 2² = 380561861 is a prime.

It is not an unprimeable number, because it can be changed into a prime (380561861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25692 + ... + 37698.

It is an arithmetic number, because the mean of its divisors is an integer number (38077368).

Almost surely, 2^380561865 is an apocalyptic number.

It is an amenable number.

380561865 is a deficient number, since it is larger than the sum of its proper divisors (228676023).

380561865 is a wasteful number, since it uses less digits than its factorization.

380561865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14128.

The product of its (nonzero) digits is 172800, while the sum is 42.

The square root of 380561865 is about 19507.9948995277. The cubic root of 380561865 is about 724.6724576726.

The spelling of 380561865 in words is "three hundred eighty million, five hundred sixty-one thousand, eight hundred sixty-five".