63621800 has 96 divisors (see below), whose sum is σ = 163382400. Its totient is φ = 23038400.

The previous prime is 63621799. The next prime is 63621809. The reversal of 63621800 is 812636.

63621800 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 63621800.

It is not an unprimeable number, because it can be changed into a prime (63621809) 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 23 ways as a sum of consecutive naturals, for example, 266081 + ... + 266319.

It is an arithmetic number, because the mean of its divisors is an integer number (1701900).

Almost surely, 2^63621800 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 63621800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81691200).

63621800 is an abundant number, since it is smaller than the sum of its proper divisors (99760600).

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

63621800 is a wasteful number, since it uses less digits than its factorization.

63621800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 63621800 is about 7976.3274757247. The cubic root of 63621800 is about 399.2105261862.

The spelling of 63621800 in words is "sixty-three million, six hundred twenty-one thousand, eight hundred".