605521980 has 336 divisors, whose sum is σ = 2313662400. Its totient is φ = 129890304.

The previous prime is 605521883. The next prime is 605521981. The reversal of 605521980 is 89125506.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (605521981) by changing a digit.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 1734846 + ... + 1735194.

It is an arithmetic number, because the mean of its divisors is an integer number (6885900).

Almost surely, 2^605521980 is an apocalyptic number.

605521980 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 605521980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1156831200).

605521980 is an abundant number, since it is smaller than the sum of its proper divisors (1708140420).

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

605521980 is a wasteful number, since it uses less digits than its factorization.

605521980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400 (or 383 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 605521980 is about 24607.3562171965. The cubic root of 605521980 is about 846.0122225486.

The spelling of 605521980 in words is "six hundred five million, five hundred twenty-one thousand, nine hundred eighty".