623676564 has 96 divisors (see below), whose sum is σ = 1852247040. Its totient is φ = 177777504.

The previous prime is 623676563. The next prime is 623676589. The reversal of 623676564 is 465676326.

623676564 is a `hidden beast` number, since 6 + 23 + 67 + 6 + 564 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (623676563) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 485467 + ... + 486749.

It is an arithmetic number, because the mean of its divisors is an integer number (19294240).

Almost surely, 2^623676564 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 623676564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (926123520).

623676564 is an abundant number, since it is smaller than the sum of its proper divisors (1228570476).

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

623676564 is a wasteful number, since it uses less digits than its factorization.

623676564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1946 (or 1938 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 45.

The square root of 623676564 is about 24973.5172532825. The cubic root of 623676564 is about 854.3840685547.

The spelling of 623676564 in words is "six hundred twenty-three million, six hundred seventy-six thousand, five hundred sixty-four".