813491340 has 24 divisors (see below), whose sum is σ = 2277775920. Its totient is φ = 216931008.

The previous prime is 813491339. The next prime is 813491359. The reversal of 813491340 is 43194318.

It is a super-3 number, since 3×813491340³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6779035 + ... + 6779154.

It is an arithmetic number, because the mean of its divisors is an integer number (94907330).

Almost surely, 2^813491340 is an apocalyptic number.

It is an amenable number.

813491340 is an abundant number, since it is smaller than the sum of its proper divisors (1464284580).

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

813491340 is a wasteful number, since it uses less digits than its factorization.

813491340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13558201 (or 13558199 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 813491340 is about 28521.7695804450. The cubic root of 813491340 is about 933.5071413838.

The spelling of 813491340 in words is "eight hundred thirteen million, four hundred ninety-one thousand, three hundred forty".