868447536 has 80 divisors (see below), whose sum is σ = 2465258880. Its totient is φ = 261250560.

The previous prime is 868447523. The next prime is 868447561. The reversal of 868447536 is 635744868.

868447536 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×868447536² = 1508402245568942592, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67476 + ... + 79308.

It is an arithmetic number, because the mean of its divisors is an integer number (30815736).

Almost surely, 2^868447536 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 868447536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1232629440).

868447536 is an abundant number, since it is smaller than the sum of its proper divisors (1596811344).

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

868447536 is a wasteful number, since it uses less digits than its factorization.

868447536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11994 (or 11988 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 51.

The square root of 868447536 is about 29469.4339273763. The cubic root of 868447536 is about 954.0720996451.

The spelling of 868447536 in words is "eight hundred sixty-eight million, four hundred forty-seven thousand, five hundred thirty-six".