868499520 has 336 divisors, whose sum is σ = 3300984000. Its totient is φ = 192761856.

The previous prime is 868499497. The next prime is 868499521. The reversal of 868499520 is 25994868.

It is a tau number, because it is divible by the number of its divisors (336).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868499521) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1740231 + ... + 1740729.

Almost surely, 2^868499520 is an apocalyptic number.

868499520 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 868499520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1650492000).

868499520 is an abundant number, since it is smaller than the sum of its proper divisors (2432484480).

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

868499520 is a wasteful number, since it uses less digits than its factorization.

868499520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570 (or 553 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 51.

The square root of 868499520 is about 29470.3159127960. The cubic root of 868499520 is about 954.0911357191.

It can be divided in two parts, 86849 and 9520, that added together give a palindrome (96369).

The spelling of 868499520 in words is "eight hundred sixty-eight million, four hundred ninety-nine thousand, five hundred twenty".