851798 has 4 divisors (see below), whose sum is σ = 1277700. Its totient is φ = 425898.

The previous prime is 851797. The next prime is 851801. The reversal of 851798 is 897158.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212948 + ... + 212951.

It is an arithmetic number, because the mean of its divisors is an integer number (319425).

2⁸⁵¹⁷⁹⁸ is an apocalyptic number.

851798 is a deficient number, since it is larger than the sum of its proper divisors (425902).

851798 is a wasteful number, since it uses less digits than its factorization.

851798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425901.

The product of its digits is 20160, while the sum is 38.

The square root of 851798 is about 922.9290330247. The cubic root of 851798 is about 94.7935683768.

The spelling of 851798 in words is "eight hundred fifty-one thousand, seven hundred ninety-eight".