813114440 has 16 divisors (see below), whose sum is σ = 1829507580. Its totient is φ = 325245760.

The previous prime is 813114433. The next prime is 813114451. The reversal of 813114440 is 44411318.

It can be written as a sum of positive squares in 2 ways, for example, as 747147556 + 65966884 = 27334^2 + 8122^2 .

It is a super-2 number, since 2×813114440² = 1322310185073027200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10163891 + ... + 10163970.

Almost surely, 2^813114440 is an apocalyptic number.

It is an amenable number.

813114440 is an abundant number, since it is smaller than the sum of its proper divisors (1016393140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

813114440 is a wasteful number, since it uses less digits than its factorization.

813114440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20327872 (or 20327868 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 26.

The square root of 813114440 is about 28515.1615811659. The cubic root of 813114440 is about 933.3629508742.

Adding to 813114440 its reverse (44411318), we get a palindrome (857525758).

The spelling of 813114440 in words is "eight hundred thirteen million, one hundred fourteen thousand, four hundred forty".