623443680 has 144 divisors (see below), whose sum is σ = 2134051920. Its totient is φ = 165740544.

The previous prime is 623443679. The next prime is 623443693. The reversal of 623443680 is 86344326.

It is a happy number.

623443680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-3 number, since 3×623443680³ (a number of 27 digits) contains 333 as substring.

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 23 ways as a sum of consecutive naturals, for example, 810336 + ... + 811104.

It is an arithmetic number, because the mean of its divisors is an integer number (14819805).

Almost surely, 2^623443680 is an apocalyptic number.

623443680 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 623443680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1067025960).

623443680 is an abundant number, since it is smaller than the sum of its proper divisors (1510608240).

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

623443680 is a wasteful number, since it uses less digits than its factorization.

623443680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1353 (or 1342 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 623443680 is about 24968.8541987813. The cubic root of 623443680 is about 854.2777115305.

The spelling of 623443680 in words is "six hundred twenty-three million, four hundred forty-three thousand, six hundred eighty".