868720 has 20 divisors (see below), whose sum is σ = 2019960. Its totient is φ = 347456.

The previous prime is 868697. The next prime is 868727. The reversal of 868720 is 27868.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868727) by changing a digit.

868720 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5350 + ... + 5509.

It is an arithmetic number, because the mean of its divisors is an integer number (100998).

2⁸⁶⁸⁷²⁰ is an apocalyptic number.

868720 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

868720 is an abundant number, since it is smaller than the sum of its proper divisors (1151240).

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

868720 is a wasteful number, since it uses less digits than its factorization.

868720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10872 (or 10866 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 31.

The square root of 868720 is about 932.0515007230. The cubic root of 868720 is about 95.4171865073.

The spelling of 868720 in words is "eight hundred sixty-eight thousand, seven hundred twenty".