123036400 has 60 divisors (see below), whose sum is σ = 311171800. Its totient is φ = 46621440.

The previous prime is 123036391. The next prime is 123036413. The reversal of 123036400 is 4630321.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 495 + ... + 15694.

Almost surely, 2^123036400 is an apocalyptic number.

123036400 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 123036400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155585900).

123036400 is an abundant number, since it is smaller than the sum of its proper divisors (188135400).

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

123036400 is a wasteful number, since it uses less digits than its factorization.

123036400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16226 (or 16215 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 123036400 is about 11092.1774237523. The cubic root of 123036400 is about 497.3680365127.

Adding to 123036400 its reverse (4630321), we get a palindrome (127666721).

The spelling of 123036400 in words is "one hundred twenty-three million, thirty-six thousand, four hundred".