623123620 has 96 divisors (see below), whose sum is σ = 1596268800. Its totient is φ = 199563264.

The previous prime is 623123581. The next prime is 623123629. The reversal of 623123620 is 26321326.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (623123629) 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 31 ways as a sum of consecutive naturals, for example, 192576 + ... + 195784.

It is an arithmetic number, because the mean of its divisors is an integer number (16627800).

Almost surely, 2^623123620 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 623123620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (798134400).

623123620 is an abundant number, since it is smaller than the sum of its proper divisors (973145180).

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

623123620 is a wasteful number, since it uses less digits than its factorization.

623123620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3317 (or 3315 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 623123620 is about 24962.4441912245. Note that the first 3 decimals coincide. The cubic root of 623123620 is about 854.1314984159.

Adding to 623123620 its reverse (26321326), we get a palindrome (649444946).

The spelling of 623123620 in words is "six hundred twenty-three million, one hundred twenty-three thousand, six hundred twenty".