623947688 has 128 divisors (see below), whose sum is σ = 1537536000. Its totient is φ = 230480640.

The previous prime is 623947661. The next prime is 623947697. The reversal of 623947688 is 886749326.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1092443 + ... + 1093013.

It is an arithmetic number, because the mean of its divisors is an integer number (12012000).

Almost surely, 2^623947688 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 623947688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (768768000).

623947688 is an abundant number, since it is smaller than the sum of its proper divisors (913588312).

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

623947688 is a wasteful number, since it uses less digits than its factorization.

623947688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695 (or 691 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 53.

The square root of 623947688 is about 24978.9448936499. The cubic root of 623947688 is about 854.5078562576.

The spelling of 623947688 in words is "six hundred twenty-three million, nine hundred forty-seven thousand, six hundred eighty-eight".