869569872 has 80 divisors (see below), whose sum is σ = 2350296000. Its totient is φ = 276677632.

The previous prime is 869569867. The next prime is 869569879. The reversal of 869569872 is 278965968.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869569879) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 120379 + ... + 127397.

It is an arithmetic number, because the mean of its divisors is an integer number (29378700).

Almost surely, 2^869569872 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 869569872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1175148000).

869569872 is an abundant number, since it is smaller than the sum of its proper divisors (1480726128).

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

869569872 is a wasteful number, since it uses less digits than its factorization.

869569872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7148 (or 7142 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 60.

The square root of 869569872 is about 29488.4701536041. The cubic root of 869569872 is about 954.4829202851.

The spelling of 869569872 in words is "eight hundred sixty-nine million, five hundred sixty-nine thousand, eight hundred seventy-two".