623839680 has 336 divisors, whose sum is σ = 2255239584. Its totient is φ = 158146560.

The previous prime is 623839661. The next prime is 623839681. The reversal of 623839680 is 86938326.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623839681) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9311007 + ... + 9311073.

Almost surely, 2^623839680 is an apocalyptic number.

623839680 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 623839680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1127619792).

623839680 is an abundant number, since it is smaller than the sum of its proper divisors (1631399904).

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

623839680 is a wasteful number, since it uses less digits than its factorization.

623839680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The square root of 623839680 is about 24976.7828192504. The cubic root of 623839680 is about 854.4585470969.

The spelling of 623839680 in words is "six hundred twenty-three million, eight hundred thirty-nine thousand, six hundred eighty".