620927980 has 48 divisors (see below), whose sum is σ = 1389185280. Its totient is φ = 232452288.

The previous prime is 620927953. The next prime is 620928017. The reversal of 620927980 is 89729026.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21697 + ... + 41383.

It is an arithmetic number, because the mean of its divisors is an integer number (28941360).

Almost surely, 2^620927980 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 620927980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (694592640).

620927980 is an abundant number, since it is smaller than the sum of its proper divisors (768257300).

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

620927980 is a wasteful number, since it uses less digits than its factorization.

620927980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19798 (or 19796 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 43.

The square root of 620927980 is about 24918.4265153320. The cubic root of 620927980 is about 853.1271111506.

The spelling of 620927980 in words is "six hundred twenty million, nine hundred twenty-seven thousand, nine hundred eighty".