1123505680 has 40 divisors (see below), whose sum is σ = 2849621184. Its totient is φ = 408547200.

The previous prime is 1123505641. The next prime is 1123505681. The reversal of 1123505680 is 865053211.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (1123505681) 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, 637476 + ... + 639235.

Almost surely, 2^1123505680 is an apocalyptic number.

1123505680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123505680 is an abundant number, since it is smaller than the sum of its proper divisors (1726115504).

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

1123505680 is a wasteful number, since it uses less digits than its factorization.

1123505680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276735 (or 1276729 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 1123505680 is about 33518.7362530272. The cubic root of 1123505680 is about 1039.5812169904.

Adding to 1123505680 its reverse (865053211), we get a palindrome (1988558891).

The spelling of 1123505680 in words is "one billion, one hundred twenty-three million, five hundred five thousand, six hundred eighty".