881806401 has 18 divisors (see below), whose sum is σ = 1481675442. Its totient is φ = 503889120.

The previous prime is 881806399. The next prime is 881806427. The reversal of 881806401 is 104608188.

881806401 is a `hidden beast` number, since 8 + 8 + 1 + 8 + 0 + 640 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 629759025 + 252047376 = 25095^2 + 15876^2 .

It is not a de Polignac number, because 881806401 - 2¹ = 881806399 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (881806481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 999340 + ... + 1000221.

Almost surely, 2^881806401 is an apocalyptic number.

It is an amenable number.

881806401 is a deficient number, since it is larger than the sum of its proper divisors (599869041).

881806401 is a wasteful number, since it uses less digits than its factorization.

881806401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999581 (or 1999571 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 881806401 is about 29695.2252222474. The cubic root of 881806401 is about 958.9392221769.

The spelling of 881806401 in words is "eight hundred eighty-one million, eight hundred six thousand, four hundred one".