813019896 has 128 divisors (see below), whose sum is σ = 2450784000. Its totient is φ = 248241024.

The previous prime is 813019853. The next prime is 813019913. The reversal of 813019896 is 698910318.

It is a super-2 number, since 2×813019896² = 1322002702583701632, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 389271 + ... + 391353.

It is an arithmetic number, because the mean of its divisors is an integer number (19146750).

Almost surely, 2^813019896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 813019896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1225392000).

813019896 is an abundant number, since it is smaller than the sum of its proper divisors (1637764104).

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

813019896 is a wasteful number, since it uses less digits than its factorization.

813019896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2250 (or 2240 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 813019896 is about 28513.5037482243. The cubic root of 813019896 is about 933.3267742169.

The spelling of 813019896 in words is "eight hundred thirteen million, nineteen thousand, eight hundred ninety-six".