813688452 has 36 divisors (see below), whose sum is σ = 2165079280. Its totient is φ = 256954032.

The previous prime is 813688451. The next prime is 813688517. The reversal of 813688452 is 254886318.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 813688398 and 813688407.

It is not an unprimeable number, because it can be changed into a prime (813688451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 594118 + ... + 595485.

Almost surely, 2^813688452 is an apocalyptic number.

It is an amenable number.

813688452 is an abundant number, since it is smaller than the sum of its proper divisors (1351390828).

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

813688452 is a wasteful number, since it uses less digits than its factorization.

813688452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189632 (or 1189627 counting only the distinct ones).

The product of its digits is 368640, while the sum is 45.

The square root of 813688452 is about 28525.2248369754. The cubic root of 813688452 is about 933.5825327210.

The spelling of 813688452 in words is "eight hundred thirteen million, six hundred eighty-eight thousand, four hundred fifty-two".