869066240 has 80 divisors (see below), whose sum is σ = 2381445792. Its totient is φ = 297959424.

The previous prime is 869066239. The next prime is 869066243. The reversal of 869066240 is 42660968.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×869066240² = 1510552259015475200, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869066243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6329 + ... + 42168.

Almost surely, 2^869066240 is an apocalyptic number.

869066240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 869066240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1190722896).

869066240 is an abundant number, since it is smaller than the sum of its proper divisors (1512379552).

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

869066240 is an equidigital number, since it uses as much as digits as its factorization.

869066240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48527 (or 48511 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 869066240 is about 29479.9294436062. The cubic root of 869066240 is about 954.2986142307.

The spelling of 869066240 in words is "eight hundred sixty-nine million, sixty-six thousand, two hundred forty".