621230688 has 384 divisors, whose sum is σ = 2133734400. Its totient is φ = 174182400.

The previous prime is 621230639. The next prime is 621230693. The reversal of 621230688 is 886032126.

621230688 is a `hidden beast` number, since 621 + 23 + 0 + 6 + 8 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8749693 + ... + 8749763.

It is an arithmetic number, because the mean of its divisors is an integer number (5556600).

Almost surely, 2^621230688 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 621230688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1066867200).

621230688 is an abundant number, since it is smaller than the sum of its proper divisors (1512503712).

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

621230688 is a wasteful number, since it uses less digits than its factorization.

621230688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 621230688 is about 24924.4997542579. The cubic root of 621230688 is about 853.2657243527.

The spelling of 621230688 in words is "six hundred twenty-one million, two hundred thirty thousand, six hundred eighty-eight".