380128563 has 12 divisors (see below), whose sum is σ = 558381720. Its totient is φ = 249123456.

The previous prime is 380128559. The next prime is 380128579. The reversal of 380128563 is 365821083.

380128563 is a `hidden beast` number, since 3 + 80 + 12 + 8 + 563 = 666.

It is not a de Polignac number, because 380128563 - 2² = 380128559 is a prime.

It is a super-3 number, since 3×380128563³ (a number of 27 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (380128543) 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, 357406 + ... + 358467.

It is an arithmetic number, because the mean of its divisors is an integer number (46531810).

Almost surely, 2^380128563 is an apocalyptic number.

380128563 is a deficient number, since it is larger than the sum of its proper divisors (178253157).

380128563 is a wasteful number, since it uses less digits than its factorization.

380128563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715938 (or 715935 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 380128563 is about 19496.8859821255. The cubic root of 380128563 is about 724.3973195131.

The spelling of 380128563 in words is "three hundred eighty million, one hundred twenty-eight thousand, five hundred sixty-three".