868620 has 48 divisors (see below), whose sum is σ = 2515968. Its totient is φ = 223680.

The previous prime is 868613. The next prime is 868639. The reversal of 868620 is 26868.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1627 + ... + 2093.

It is an arithmetic number, because the mean of its divisors is an integer number (52416).

2⁸⁶⁸⁶²⁰ 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 868620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1257984).

868620 is an abundant number, since it is smaller than the sum of its proper divisors (1647348).

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

868620 is a wasteful number, since it uses less digits than its factorization.

868620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 868620 is about 931.9978540748. The cubic root of 868620 is about 95.4135251493.

The spelling of 868620 in words is "eight hundred sixty-eight thousand, six hundred twenty".