813497340 has 24 divisors (see below), whose sum is σ = 2277792720. Its totient is φ = 216932608.

The previous prime is 813497309. The next prime is 813497341. The reversal of 813497340 is 43794318.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813497341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6779085 + ... + 6779204.

It is an arithmetic number, because the mean of its divisors is an integer number (94908030).

Almost surely, 2^813497340 is an apocalyptic number.

It is an amenable number.

813497340 is an abundant number, since it is smaller than the sum of its proper divisors (1464295380).

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

813497340 is a wasteful number, since it uses less digits than its factorization.

813497340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13558301 (or 13558299 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 813497340 is about 28521.8747630656. The cubic root of 813497340 is about 933.5094364416.

The spelling of 813497340 in words is "eight hundred thirteen million, four hundred ninety-seven thousand, three hundred forty".