620441900 has 72 divisors (see below), whose sum is σ = 1489227600. Its totient is φ = 222877440.

The previous prime is 620441891. The next prime is 620441933. The reversal of 620441900 is 9144026.

620441900 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×620441900² = 769896302551220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 620441900.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41651 + ... + 54549.

Almost surely, 2^620441900 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 620441900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (744613800).

620441900 is an abundant number, since it is smaller than the sum of its proper divisors (868785700).

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

620441900 is a wasteful number, since it uses less digits than its factorization.

620441900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12963 (or 12956 counting only the distinct ones).

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

The square root of 620441900 is about 24908.6711809362. The cubic root of 620441900 is about 852.9044356840.

Adding to 620441900 its reverse (9144026), we get a palindrome (629585926).

The spelling of 620441900 in words is "six hundred twenty million, four hundred forty-one thousand, nine hundred".