620880 has 80 divisors (see below), whose sum is σ = 2083200. Its totient is φ = 152064.

The previous prime is 620869. The next prime is 620887. The reversal of 620880 is 88026.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 620880.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 620880.

It is not an unprimeable number, because it can be changed into a prime (620887) by changing a digit.

620880 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 15 ways as a sum of consecutive naturals, for example, 3021 + ... + 3219.

It is an arithmetic number, because the mean of its divisors is an integer number (26040).

2⁶²⁰⁸⁸⁰ is an apocalyptic number.

620880 is a gapful number since it is divisible by the number (60) 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 620880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1041600).

620880 is an abundant number, since it is smaller than the sum of its proper divisors (1462320).

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

620880 is a wasteful number, since it uses less digits than its factorization.

620880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228 (or 222 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 620880 is about 787.9593898165. The cubic root of 620880 is about 85.3105136464.

The spelling of 620880 in words is "six hundred twenty thousand, eight hundred eighty".