623687680 has 288 divisors, whose sum is σ = 1915870320. Its totient is φ = 192675840.

The previous prime is 623687671. The next prime is 623687689. The reversal of 623687680 is 86786326.

It is an interprime number because it is at equal distance from previous prime (623687671) and next prime (623687689).

It is a self number, because there is not a number n which added to its sum of digits gives 623687680.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623687689) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5519304 + ... + 5519416.

Almost surely, 2^623687680 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 623687680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (957935160).

623687680 is an abundant number, since it is smaller than the sum of its proper divisors (1292182640).

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

623687680 is a wasteful number, since it uses less digits than its factorization.

623687680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 138 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The square root of 623687680 is about 24973.7398080464. The cubic root of 623687680 is about 854.3891445174.

The spelling of 623687680 in words is "six hundred twenty-three million, six hundred eighty-seven thousand, six hundred eighty".