813605438 has 16 divisors (see below), whose sum is σ = 1269898560. Its totient is φ = 390632736.

The previous prime is 813605413. The next prime is 813605459. The reversal of 813605438 is 834506318.

It is a congruent number.

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, 76673 + ... + 86636.

It is an arithmetic number, because the mean of its divisors is an integer number (79368660).

Almost surely, 2^813605438 is an apocalyptic number.

813605438 is a deficient number, since it is larger than the sum of its proper divisors (456293122).

813605438 is a wasteful number, since it uses less digits than its factorization.

813605438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163411.

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 813605438 is about 28523.7697017768. The cubic root of 813605438 is about 933.5507830361.

The spelling of 813605438 in words is "eight hundred thirteen million, six hundred five thousand, four hundred thirty-eight".