123311423400 has 384 divisors, whose sum is σ = 424937802240. Its totient is φ = 29331072000.

The previous prime is 123311423399. The next prime is 123311423447. The reversal of 123311423400 is 4324113321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 89290710 + ... + 89292090.

It is an arithmetic number, because the mean of its divisors is an integer number (1106608860).

Almost surely, 2^123311423400 is an apocalyptic number.

123311423400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123311423400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (212468901120).

123311423400 is an abundant number, since it is smaller than the sum of its proper divisors (301626378840).

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

123311423400 is a wasteful number, since it uses less digits than its factorization.

123311423400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657 (or 1648 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 123311423400 its reverse (4324113321), we get a palindrome (127635536721).

The spelling of 123311423400 in words is "one hundred twenty-three billion, three hundred eleven million, four hundred twenty-three thousand, four hundred".