623566320 has 320 divisors, whose sum is σ = 2238190080. Its totient is φ = 142331904.

The previous prime is 623566309. The next prime is 623566351. The reversal of 623566320 is 23665326.

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, 3971682 + ... + 3971838.

It is an arithmetic number, because the mean of its divisors is an integer number (6994344).

Almost surely, 2^623566320 is an apocalyptic number.

623566320 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 623566320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1119095040).

623566320 is an abundant number, since it is smaller than the sum of its proper divisors (1614623760).

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

623566320 is a wasteful number, since it uses less digits than its factorization.

623566320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 266 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 33.

The square root of 623566320 is about 24971.3099376064. The cubic root of 623566320 is about 854.3337239407. Note that the first 3 decimals are identical.

The spelling of 623566320 in words is "six hundred twenty-three million, five hundred sixty-six thousand, three hundred twenty".