380665780 has 24 divisors (see below), whose sum is σ = 872071200. Its totient is φ = 138423840.

The previous prime is 380665763. The next prime is 380665783. The reversal of 380665780 is 87566083.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (380665783) 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 7 ways as a sum of consecutive naturals, for example, 864930 + ... + 865369.

It is an arithmetic number, because the mean of its divisors is an integer number (36336300).

Almost surely, 2^380665780 is an apocalyptic number.

It is an amenable number.

380665780 is an abundant number, since it is smaller than the sum of its proper divisors (491405420).

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

380665780 is a wasteful number, since it uses less digits than its factorization.

380665780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1730319 (or 1730317 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 380665780 is about 19510.6581129392. The cubic root of 380665780 is about 724.7384105809.

The spelling of 380665780 in words is "three hundred eighty million, six hundred sixty-five thousand, seven hundred eighty".