817385838 has 8 divisors (see below), whose sum is σ = 1634771688. Its totient is φ = 272461944.

The previous prime is 817385827. The next prime is 817385869. The reversal of 817385838 is 838583718.

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

817385838 is an admirable number.

It is a congruent number.

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, 68115481 + ... + 68115492.

It is an arithmetic number, because the mean of its divisors is an integer number (204346461).

Almost surely, 2^817385838 is an apocalyptic number.

817385838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

817385838 is a wasteful number, since it uses less digits than its factorization.

817385838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136230978.

The product of its digits is 1290240, while the sum is 51.

The square root of 817385838 is about 28589.9604406862. The cubic root of 817385838 is about 934.9944571530.

The spelling of 817385838 in words is "eight hundred seventeen million, three hundred eighty-five thousand, eight hundred thirty-eight".