868808520 has 48 divisors (see below), whose sum is σ = 2823628860. Its totient is φ = 231682176.

The previous prime is 868808513. The next prime is 868808527. The reversal of 868808520 is 25808868.

It is an interprime number because it is at equal distance from previous prime (868808513) and next prime (868808527).

It can be written as a sum of positive squares in 2 ways, for example, as 853457796 + 15350724 = 29214^2 + 3918^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (868808527) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1206319 + ... + 1207038.

Almost surely, 2^868808520 is an apocalyptic number.

It is an amenable number.

868808520 is an abundant number, since it is smaller than the sum of its proper divisors (1954820340).

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

868808520 is a wasteful number, since it uses less digits than its factorization.

868808520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2413374 (or 2413367 counting only the distinct ones).

The product of its (nonzero) digits is 245760, while the sum is 45.

The square root of 868808520 is about 29475.5580099852. The cubic root of 868808520 is about 954.2042730697.

The spelling of 868808520 in words is "eight hundred sixty-eight million, eight hundred eight thousand, five hundred twenty".