869265520 has 20 divisors (see below), whose sum is σ = 2021042520. Its totient is φ = 347706176.

The previous prime is 869265503. The next prime is 869265541. The reversal of 869265520 is 25562968.

It is a tau number, because it is divible by the number of its divisors (20).

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5432830 + ... + 5432989.

It is an arithmetic number, because the mean of its divisors is an integer number (101052126).

Almost surely, 2^869265520 is an apocalyptic number.

869265520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

869265520 is an abundant number, since it is smaller than the sum of its proper divisors (1151777000).

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

869265520 is a wasteful number, since it uses less digits than its factorization.

869265520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10865832 (or 10865826 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 43.

The square root of 869265520 is about 29483.3091765494. The cubic root of 869265520 is about 954.3715500190.

The spelling of 869265520 in words is "eight hundred sixty-nine million, two hundred sixty-five thousand, five hundred twenty".