857798355 has 8 divisors (see below), whose sum is σ = 1372477392. Its totient is φ = 457492448.

The previous prime is 857798309. The next prime is 857798369. The reversal of 857798355 is 553897758.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-857798355 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 857798295 and 857798304.

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, 28593264 + ... + 28593293.

It is an arithmetic number, because the mean of its divisors is an integer number (171559674).

Almost surely, 2^857798355 is an apocalyptic number.

857798355 is a deficient number, since it is larger than the sum of its proper divisors (514679037).

857798355 is a wasteful number, since it uses less digits than its factorization.

857798355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57186565.

The product of its digits is 10584000, while the sum is 57.

The square root of 857798355 is about 29288.1948060989. The cubic root of 857798355 is about 950.1563380748.

The spelling of 857798355 in words is "eight hundred fifty-seven million, seven hundred ninety-eight thousand, three hundred fifty-five".