621004608 has 336 divisors, whose sum is σ = 2168225280. Its totient is φ = 166182912.

The previous prime is 621004547. The next prime is 621004621. The reversal of 621004608 is 806400126.

It is a tau number, because it is divible by the number of its divisors (336).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5495560 + ... + 5495672.

Almost surely, 2^621004608 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 621004608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1084112640).

621004608 is an abundant number, since it is smaller than the sum of its proper divisors (1547220672).

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

621004608 is a wasteful number, since it uses less digits than its factorization.

621004608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214 (or 201 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 621004608 is about 24919.9640449179. The cubic root of 621004608 is about 853.1622041820.

The spelling of 621004608 in words is "six hundred twenty-one million, four thousand, six hundred eight".