1123522400 has 576 divisors, whose sum is σ = 3905750016. Its totient is φ = 304128000.

The previous prime is 1123522349. The next prime is 1123522409. The reversal of 1123522400 is 42253211.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123522409) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18418370 + ... + 18418430.

It is an arithmetic number, because the mean of its divisors is an integer number (6780816).

Almost surely, 2^1123522400 is an apocalyptic number.

1123522400 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 1123522400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1952875008).

1123522400 is an abundant number, since it is smaller than the sum of its proper divisors (2782227616).

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

1123522400 is a wasteful number, since it uses less digits than its factorization.

1123522400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1123522400 is about 33518.9856648437. The cubic root of 1123522400 is about 1039.5863739771.

Adding to 1123522400 its reverse (42253211), we get a palindrome (1165775611).

The spelling of 1123522400 in words is "one billion, one hundred twenty-three million, five hundred twenty-two thousand, four hundred".