621227880 has 640 divisors, whose sum is σ = 2683296000. Its totient is φ = 128024064.

The previous prime is 621227851. The next prime is 621227881. The reversal of 621227880 is 88722126.

It is a happy number.

621227880 is a `hidden beast` number, since 621 + 2 + 27 + 8 + 8 + 0 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621227881) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 14447139 + ... + 14447181.

It is an arithmetic number, because the mean of its divisors is an integer number (4192650).

Almost surely, 2^621227880 is an apocalyptic number.

621227880 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 621227880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1341648000).

621227880 is an abundant number, since it is smaller than the sum of its proper divisors (2062068120).

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

621227880 is a wasteful number, since it uses less digits than its factorization.

621227880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100 (or 73 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 621227880 is about 24924.4434240767. The cubic root of 621227880 is about 853.2644387467.

The spelling of 621227880 in words is "six hundred twenty-one million, two hundred twenty-seven thousand, eight hundred eighty".