851764224 has 88 divisors (see below), whose sum is σ = 2389913440. Its totient is φ = 268959744.

The previous prime is 851764211. The next prime is 851764229. The reversal of 851764224 is 422467158.

It is a Cunningham number, because it is equal to 29185²-1.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (851764229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51072 + ... + 65664.

Almost surely, 2^851764224 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 851764224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1194956720).

851764224 is an abundant number, since it is smaller than the sum of its proper divisors (1538149216).

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

851764224 is a wasteful number, since it uses less digits than its factorization.

851764224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14635 (or 14617 counting only the distinct ones).

The product of its digits is 107520, while the sum is 39.

The square root of 851764224 is about 29184.9999828679. Note that the first 4 decimals coincide. The cubic root of 851764224 is about 947.9231542332.

The spelling of 851764224 in words is "eight hundred fifty-one million, seven hundred sixty-four thousand, two hundred twenty-four".