847469664 has 72 divisors (see below), whose sum is σ = 2415231000. Its totient is φ = 281875968.

The previous prime is 847469663. The next prime is 847469699. The reversal of 847469664 is 466964748.

It is a tau number, because it is divible by the number of its divisors (72).

It is a self number, because there is not a number n which added to its sum of digits gives 847469664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (847469663) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 140764 + ... + 146660.

It is an arithmetic number, because the mean of its divisors is an integer number (33544875).

Almost surely, 2^847469664 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 847469664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1207615500).

847469664 is an abundant number, since it is smaller than the sum of its proper divisors (1567761336).

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

847469664 is a wasteful number, since it uses less digits than its factorization.

847469664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6412 (or 6401 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

The square root of 847469664 is about 29111.3322264715. The cubic root of 847469664 is about 946.3273394263.

The spelling of 847469664 in words is "eight hundred forty-seven million, four hundred sixty-nine thousand, six hundred sixty-four".