381846881 has 6 divisors (see below), whose sum is σ = 413479350. Its totient is φ = 352473888.

The previous prime is 381846841. The next prime is 381846887. The reversal of 381846881 is 188648183.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1401856 + 380445025 = 1184^2 + 19505^2 .

It is a de Polignac number, because none of the positive numbers 2^k-381846881 is a prime.

It is a super-2 number, since 2×381846881² = 291614081058856322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381846887) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1129556 + ... + 1129893.

It is an arithmetic number, because the mean of its divisors is an integer number (68913225).

Almost surely, 2^381846881 is an apocalyptic number.

It is an amenable number.

381846881 is a deficient number, since it is larger than the sum of its proper divisors (31632469).

381846881 is a wasteful number, since it uses less digits than its factorization.

381846881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2259475 (or 2259462 counting only the distinct ones).

The product of its digits is 294912, while the sum is 47.

The square root of 381846881 is about 19540.9027682960. The cubic root of 381846881 is about 725.4871912083.

The spelling of 381846881 in words is "three hundred eighty-one million, eight hundred forty-six thousand, eight hundred eighty-one".