620856 has 24 divisors (see below), whose sum is σ = 1681680. Its totient is φ = 206928.

The previous prime is 620849. The next prime is 620869. The reversal of 620856 is 658026.

620856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (24).

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

620856 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 5 ways as a sum of consecutive naturals, for example, 4240 + ... + 4383.

It is an arithmetic number, because the mean of its divisors is an integer number (70070).

2⁶²⁰⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

620856 is an abundant number, since it is smaller than the sum of its proper divisors (1060824).

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

620856 is a wasteful number, since it uses less digits than its factorization.

620856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8635 (or 8628 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 620856 is about 787.9441604581. The cubic root of 620856 is about 85.3094144116.

The spelling of 620856 in words is "six hundred twenty thousand, eight hundred fifty-six".