623668392 has 96 divisors (see below), whose sum is σ = 1817997480. Its totient is φ = 192430080.

The previous prime is 623668363. The next prime is 623668417. The reversal of 623668392 is 293866326.

It can be written as a sum of positive squares in 4 ways, for example, as 497914596 + 125753796 = 22314^2 + 11214^2 .

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70488 + ... + 78840.

Almost surely, 2^623668392 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 623668392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (908998740).

623668392 is an abundant number, since it is smaller than the sum of its proper divisors (1194329088).

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

623668392 is a wasteful number, since it uses less digits than its factorization.

623668392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8443 (or 8436 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 623668392 is about 24973.3536394294. The cubic root of 623668392 is about 854.3803368891.

The spelling of 623668392 in words is "six hundred twenty-three million, six hundred sixty-eight thousand, three hundred ninety-two".