623390112 has 72 divisors (see below), whose sum is σ = 1775785284. Its totient is φ = 207442944.

The previous prime is 623390111. The next prime is 623390123. The reversal of 623390112 is 211093326.

623390112 is a `hidden beast` number, since 623 + 39 + 0 + 1 + 1 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 485937936 + 137452176 = 22044^2 + 11724^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (623390111) 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, 209628 + ... + 212580.

Almost surely, 2^623390112 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 623390112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (887892642).

623390112 is an abundant number, since it is smaller than the sum of its proper divisors (1152395172).

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

623390112 is a wasteful number, since it uses less digits than its factorization.

623390112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3702 (or 3691 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 623390112 is about 24967.7814793385. The cubic root of 623390112 is about 854.2532435309.

The spelling of 623390112 in words is "six hundred twenty-three million, three hundred ninety thousand, one hundred twelve".