384801881 has 4 divisors (see below), whose sum is σ = 386115492. Its totient is φ = 383488272.

The previous prime is 384801871. The next prime is 384801917. The reversal of 384801881 is 188108483.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 188108483 = 491 ⋅383113.

It can be written as a sum of positive squares in 2 ways, for example, as 379470400 + 5331481 = 19480^2 + 2309^2 .

It is a cyclic number.

It is not a de Polignac number, because 384801881 - 2²⁶ = 317693017 is a prime.

It is a super-2 number, since 2×384801881² = 296144975242276322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (384801821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 656366 + ... + 656951.

It is an arithmetic number, because the mean of its divisors is an integer number (96528873).

Almost surely, 2^384801881 is an apocalyptic number.

It is an amenable number.

384801881 is a deficient number, since it is larger than the sum of its proper divisors (1313611).

384801881 is a wasteful number, since it uses less digits than its factorization.

384801881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1313610.

The product of its (nonzero) digits is 49152, while the sum is 41.

The square root of 384801881 is about 19616.3676810973. The cubic root of 384801881 is about 727.3538278929.

The spelling of 384801881 in words is "three hundred eighty-four million, eight hundred one thousand, eight hundred eighty-one".