620919960 has 128 divisors (see below), whose sum is σ = 1952225280. Its totient is φ = 157690368.

The previous prime is 620919911. The next prime is 620919991. The reversal of 620919960 is 69919026.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1012614 + ... + 1013226.

It is an arithmetic number, because the mean of its divisors is an integer number (15251760).

Almost surely, 2^620919960 is an apocalyptic number.

620919960 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 620919960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (976112640).

620919960 is an abundant number, since it is smaller than the sum of its proper divisors (1331305320).

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

620919960 is a wasteful number, since it uses less digits than its factorization.

620919960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017 (or 1013 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 620919960 is about 24918.2655897235. The cubic root of 620919960 is about 853.1234380951.

The spelling of 620919960 in words is "six hundred twenty million, nine hundred nineteen thousand, nine hundred sixty".