885390881 has 2 divisors, whose sum is σ = 885390882. Its totient is φ = 885390880.

The previous prime is 885390829. The next prime is 885390893. The reversal of 885390881 is 188093588.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 772840000 + 112550881 = 27800^2 + 10609^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-885390881 is a prime.

It is a super-2 number, since 2×885390881² = 1567834024315912322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (885390581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 442695440 + 442695441.

It is an arithmetic number, because the mean of its divisors is an integer number (442695441).

Almost surely, 2^885390881 is an apocalyptic number.

It is an amenable number.

885390881 is a deficient number, since it is larger than the sum of its proper divisors (1).

885390881 is an equidigital number, since it uses as much as digits as its factorization.

885390881 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 552960, while the sum is 50.

The square root of 885390881 is about 29755.5184965747. The cubic root of 885390881 is about 960.2368053695.

The spelling of 885390881 in words is "eight hundred eighty-five million, three hundred ninety thousand, eight hundred eighty-one".