868312536 has 288 divisors, whose sum is σ = 2906493840. Its totient is φ = 214695936.

The previous prime is 868312531. The next prime is 868312541. The reversal of 868312536 is 635213868.

868312536 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (868312531) and next prime (868312541).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868312531) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3378520 + ... + 3378776.

Almost surely, 2^868312536 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 868312536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1453246920).

868312536 is an abundant number, since it is smaller than the sum of its proper divisors (2038181304).

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

868312536 is a wasteful number, since it uses less digits than its factorization.

868312536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323 (or 299 counting only the distinct ones).

The product of its digits is 207360, while the sum is 42.

The square root of 868312536 is about 29467.1433294780. The cubic root of 868312536 is about 954.0226603094.

The spelling of 868312536 in words is "eight hundred sixty-eight million, three hundred twelve thousand, five hundred thirty-six".