623669904 has 240 divisors, whose sum is σ = 2118864384. Its totient is φ = 168652800.

The previous prime is 623669887. The next prime is 623669933. The reversal of 623669904 is 409966326.

It is a self number, because there is not a number n which added to its sum of digits gives 623669904.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 637864 + ... + 638840.

Almost surely, 2^623669904 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 623669904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1059432192).

623669904 is an abundant number, since it is smaller than the sum of its proper divisors (1495194480).

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

623669904 is a wasteful number, since it uses less digits than its factorization.

623669904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046 (or 1037 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 45.

The square root of 623669904 is about 24973.3839116768. The cubic root of 623669904 is about 854.3810273319.

The spelling of 623669904 in words is "six hundred twenty-three million, six hundred sixty-nine thousand, nine hundred four".