623455616 has 96 divisors (see below), whose sum is σ = 1459895400. Its totient is φ = 264413184.

The previous prime is 623455583. The next prime is 623455619. The reversal of 623455616 is 616554326.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 623455616.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623455619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 670640 + ... + 671568.

Almost surely, 2^623455616 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 623455616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (729947700).

623455616 is an abundant number, since it is smaller than the sum of its proper divisors (836439784).

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

623455616 is a wasteful number, since it uses less digits than its factorization.

623455616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1064 (or 1045 counting only the distinct ones).

The product of its digits is 129600, while the sum is 38.

The square root of 623455616 is about 24969.0932154133. The cubic root of 623455616 is about 854.2831632893.

The spelling of 623455616 in words is "six hundred twenty-three million, four hundred fifty-five thousand, six hundred sixteen".