380728617 has 32 divisors (see below), whose sum is σ = 560390400. Its totient is φ = 228845568.

The previous prime is 380728609. The next prime is 380728643. The reversal of 380728617 is 716827083.

It is not a de Polignac number, because 380728617 - 2³ = 380728609 is a prime.

It is a super-3 number, since 3×380728617³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (380728697) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 201684 + ... + 203562.

It is an arithmetic number, because the mean of its divisors is an integer number (17512200).

Almost surely, 2^380728617 is an apocalyptic number.

It is an amenable number.

380728617 is a deficient number, since it is larger than the sum of its proper divisors (179661783).

380728617 is a wasteful number, since it uses less digits than its factorization.

380728617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2065.

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 380728617 is about 19512.2683714631. The cubic root of 380728617 is about 724.7782862271.

The spelling of 380728617 in words is "three hundred eighty million, seven hundred twenty-eight thousand, six hundred seventeen".