123044430400 has 42 divisors (see below), whose sum is σ = 302766205490. Its totient is φ = 49217771520.

The previous prime is 123044430317. The next prime is 123044430403. The reversal of 123044430400 is 4034440321.

It can be written as a sum of positive squares in 3 ways, for example, as 26417951296 + 96626479104 = 162536^2 + 310848^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (123044430403) 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 5 ways as a sum of consecutive naturals, for example, 38449785 + ... + 38452984.

Almost surely, 2^123044430400 is an apocalyptic number.

123044430400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123044430400 is an abundant number, since it is smaller than the sum of its proper divisors (179721775090).

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

123044430400 is an equidigital number, since it uses as much as digits as its factorization.

123044430400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76902791 (or 76902776 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 123044430400 its reverse (4034440321), we get a palindrome (127078870721).

The spelling of 123044430400 in words is "one hundred twenty-three billion, forty-four million, four hundred thirty thousand, four hundred".