819490881 has 32 divisors (see below), whose sum is σ = 1260564480. Its totient is φ = 468331200.

The previous prime is 819490879. The next prime is 819490949. The reversal of 819490881 is 188094918.

It is not a de Polignac number, because 819490881 - 2¹ = 819490879 is a prime.

It is a super-2 number, since 2×819490881² = 1343130608084312322, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 819490881.

It is not an unprimeable number, because it can be changed into a prime (819490811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136891 + ... + 142751.

It is an arithmetic number, because the mean of its divisors is an integer number (39392640).

Almost surely, 2^819490881 is an apocalyptic number.

It is an amenable number.

819490881 is a deficient number, since it is larger than the sum of its proper divisors (441073599).

819490881 is a wasteful number, since it uses less digits than its factorization.

819490881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6117.

The product of its (nonzero) digits is 165888, while the sum is 48.

The square root of 819490881 is about 28626.7511429432. The cubic root of 819490881 is about 935.7964106752.

The spelling of 819490881 in words is "eight hundred nineteen million, four hundred ninety thousand, eight hundred eighty-one".