849811572 has 72 divisors (see below), whose sum is σ = 2278785600. Its totient is φ = 266105088.

The previous prime is 849811561. The next prime is 849811577. The reversal of 849811572 is 275118948.

849811572 is a `hidden beast` number, since 8 + 498 + 1 + 157 + 2 = 666.

It is a super-2 number, since 2×849811572² = 1444359415810222368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (849811577) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 451329 + ... + 453207.

It is an arithmetic number, because the mean of its divisors is an integer number (31649800).

Almost surely, 2^849811572 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 849811572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1139392800).

849811572 is an abundant number, since it is smaller than the sum of its proper divisors (1428974028).

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

849811572 is a wasteful number, since it uses less digits than its factorization.

849811572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2645 (or 2640 counting only the distinct ones).

The product of its digits is 161280, while the sum is 45.

The square root of 849811572 is about 29151.5277815760. The cubic root of 849811572 is about 947.1982352054.

The spelling of 849811572 in words is "eight hundred forty-nine million, eight hundred eleven thousand, five hundred seventy-two".