813405726 has 40 divisors (see below), whose sum is σ = 2083010160. Its totient is φ = 232401312.

The previous prime is 813405721. The next prime is 813405767. The reversal of 813405726 is 627504318.

813405726 is a `hidden beast` number, since 81 + 3 + 4 + 0 + 572 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813405721) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 357511 + ... + 359778.

It is an arithmetic number, because the mean of its divisors is an integer number (52075254).

Almost surely, 2^813405726 is an apocalyptic number.

813405726 is an abundant number, since it is smaller than the sum of its proper divisors (1269604434).

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

813405726 is a wasteful number, since it uses less digits than its factorization.

813405726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 717310 (or 717301 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 813405726 is about 28520.2686873739. The cubic root of 813405726 is about 933.4743919738.

The spelling of 813405726 in words is "eight hundred thirteen million, four hundred five thousand, seven hundred twenty-six".