623911680 has 288 divisors, whose sum is σ = 2531289600. Its totient is φ = 142553088.

The previous prime is 623911669. The next prime is 623911681. The reversal of 623911680 is 86119326.

It is a tau number, because it is divible by the number of its divisors (288).

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

It is not an unprimeable number, because it can be changed into a prime (623911681) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 240631 + ... + 243209.

It is an arithmetic number, because the mean of its divisors is an integer number (8789200).

Almost surely, 2^623911680 is an apocalyptic number.

623911680 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 623911680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1265644800).

623911680 is an abundant number, since it is smaller than the sum of its proper divisors (1907377920).

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

623911680 is a wasteful number, since it uses less digits than its factorization.

623911680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2616 (or 2596 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 623911680 is about 24978.2241162177. The cubic root of 623911680 is about 854.4914180682.

The spelling of 623911680 in words is "six hundred twenty-three million, nine hundred eleven thousand, six hundred eighty".