813736538 has 8 divisors (see below), whose sum is σ = 1237796640. Its totient is φ = 401137660.

The previous prime is 813736519. The next prime is 813736543. The reversal of 813736538 is 835637318.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2865128 + ... + 2865411.

It is an arithmetic number, because the mean of its divisors is an integer number (154724580).

Almost surely, 2^813736538 is an apocalyptic number.

813736538 is a deficient number, since it is larger than the sum of its proper divisors (424060102).

813736538 is a wasteful number, since it uses less digits than its factorization.

813736538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5730612.

The product of its digits is 362880, while the sum is 44.

The square root of 813736538 is about 28526.0676925510. The cubic root of 813736538 is about 933.6009227921.

The spelling of 813736538 in words is "eight hundred thirteen million, seven hundred thirty-six thousand, five hundred thirty-eight".