621621060 has 96 divisors (see below), whose sum is σ = 1791659520. Its totient is φ = 160954368.

The previous prime is 621621041. The next prime is 621621067. The reversal of 621621060 is 60126126.

It is a self number, because there is not a number n which added to its sum of digits gives 621621060.

It is not an unprimeable number, because it can be changed into a prime (621621067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 385536 + ... + 387144.

It is an arithmetic number, because the mean of its divisors is an integer number (18663120).

Almost surely, 2^621621060 is an apocalyptic number.

621621060 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 621621060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (895829760).

621621060 is an abundant number, since it is smaller than the sum of its proper divisors (1170038460).

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

621621060 is a wasteful number, since it uses less digits than its factorization.

621621060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805 (or 1803 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 621621060 is about 24932.3296143782. The cubic root of 621621060 is about 853.4444133692. Note that the first 4 decimals are identical.

Adding to 621621060 its reverse (60126126), we get a palindrome (681747186).

The spelling of 621621060 in words is "six hundred twenty-one million, six hundred twenty-one thousand, sixty".