1123400356 has 24 divisors (see below), whose sum is σ = 2153067840. Its totient is φ = 509703072.

The previous prime is 1123400353. The next prime is 1123400357. The reversal of 1123400356 is 6530043211.

It is a self number, because there is not a number n which added to its sum of digits gives 1123400356.

It is not an unprimeable number, because it can be changed into a prime (1123400353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180016 + ... + 186151.

It is an arithmetic number, because the mean of its divisors is an integer number (89711160).

Almost surely, 2^1123400356 is an apocalyptic number.

It is an amenable number.

1123400356 is a deficient number, since it is larger than the sum of its proper divisors (1029667484).

1123400356 is a wasteful number, since it uses less digits than its factorization.

1123400356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366243 (or 366241 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 1123400356 is about 33517.1650949182. The cubic root of 1123400356 is about 1039.5487304987.

Adding to 1123400356 its reverse (6530043211), we get a palindrome (7653443567).

The spelling of 1123400356 in words is "one billion, one hundred twenty-three million, four hundred thousand, three hundred fifty-six".