1123431400 has 192 divisors, whose sum is σ = 3404782080. Its totient is φ = 334540800.

The previous prime is 1123431391. The next prime is 1123431401. The reversal of 1123431400 is 41343211.

It is a super-2 number, since 2×1123431400² = 2524196221011920000, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1123431401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 307585 + ... + 311215.

It is an arithmetic number, because the mean of its divisors is an integer number (17733240).

Almost surely, 2^1123431400 is an apocalyptic number.

1123431400 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 1123431400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1702391040).

1123431400 is an abundant number, since it is smaller than the sum of its proper divisors (2281350680).

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

1123431400 is a wasteful number, since it uses less digits than its factorization.

1123431400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3684 (or 3675 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1123431400 is about 33517.6281977111. The cubic root of 1123431400 is about 1039.5583060263.

Adding to 1123431400 its reverse (41343211), we get a palindrome (1164774611).

The spelling of 1123431400 in words is "one billion, one hundred twenty-three million, four hundred thirty-one thousand, four hundred".