810396881 has 16 divisors (see below), whose sum is σ = 968454144. Its totient is φ = 663037584.

The previous prime is 810396863. The next prime is 810396913. The reversal of 810396881 is 188693018.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 810396881 - 2¹⁸ = 810134737 is a prime.

It is a super-2 number, since 2×810396881² = 1313486209469056322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (810396581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75980 + ... + 85986.

It is an arithmetic number, because the mean of its divisors is an integer number (60528384).

Almost surely, 2^810396881 is an apocalyptic number.

It is an amenable number.

810396881 is a deficient number, since it is larger than the sum of its proper divisors (158057263).

810396881 is a wasteful number, since it uses less digits than its factorization.

810396881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10540.

The product of its (nonzero) digits is 82944, while the sum is 44.

The square root of 810396881 is about 28467.4705760803. The cubic root of 810396881 is about 932.3219740313.

The spelling of 810396881 in words is "eight hundred ten million, three hundred ninety-six thousand, eight hundred eighty-one".