384616881 has 12 divisors (see below), whose sum is σ = 606063120. Its totient is φ = 233101080.

The previous prime is 384616871. The next prime is 384616889. The reversal of 384616881 is 188616483.

It is a happy number.

It is not a de Polignac number, because 384616881 - 2⁵ = 384616849 is a prime.

It is a super-2 number, since 2×384616881² = 295860290300336322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (384616889) 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, 1942411 + ... + 1942608.

It is an arithmetic number, because the mean of its divisors is an integer number (50505260).

Almost surely, 2^384616881 is an apocalyptic number.

It is an amenable number.

384616881 is a deficient number, since it is larger than the sum of its proper divisors (221446239).

384616881 is a wasteful number, since it uses less digits than its factorization.

384616881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3885036 (or 3885033 counting only the distinct ones).

The product of its digits is 221184, while the sum is 45.

The square root of 384616881 is about 19611.6516642531. The cubic root of 384616881 is about 727.2372466644.

The spelling of 384616881 in words is "three hundred eighty-four million, six hundred sixteen thousand, eight hundred eighty-one".