621060560 has 40 divisors (see below), whose sum is σ = 1447381320. Its totient is φ = 247836672.

The previous prime is 621060553. The next prime is 621060569. The reversal of 621060560 is 65060126.

It can be written as a sum of positive squares in 4 ways, for example, as 9784384 + 611276176 = 3128^2 + 24724^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621060569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25676 + ... + 43604.

It is an arithmetic number, because the mean of its divisors is an integer number (36184533).

Almost surely, 2^621060560 is an apocalyptic number.

It is an amenable number.

621060560 is an abundant number, since it is smaller than the sum of its proper divisors (826320760).

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

621060560 is a wasteful number, since it uses less digits than its factorization.

621060560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18375 (or 18369 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 621060560 is about 24921.0866536754. The cubic root of 621060560 is about 853.1878264814.

The spelling of 621060560 in words is "six hundred twenty-one million, sixty thousand, five hundred sixty".