851829872 has 20 divisors (see below), whose sum is σ = 1651308000. Its totient is φ = 425685888.

The previous prime is 851829857. The next prime is 851829887. The reversal of 851829872 is 278928158.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (851829857) and next prime (851829887).

It is a super-2 number, since 2×851829872² = 1451228261663072768, which contains 22 as substring.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 851829872.

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, 18668 + ... + 45300.

It is an arithmetic number, because the mean of its divisors is an integer number (82565400).

Almost surely, 2^851829872 is an apocalyptic number.

It is an amenable number.

851829872 is a deficient number, since it is larger than the sum of its proper divisors (799478128).

851829872 is a wasteful number, since it uses less digits than its factorization.

851829872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28640 (or 28634 counting only the distinct ones).

The product of its digits is 645120, while the sum is 50.

The square root of 851829872 is about 29186.1246485380. The cubic root of 851829872 is about 947.9475066924.

The spelling of 851829872 in words is "eight hundred fifty-one million, eight hundred twenty-nine thousand, eight hundred seventy-two".