1223445680 has 40 divisors (see below), whose sum is σ = 2866249584. Its totient is φ = 485638400.

The previous prime is 1223445679. The next prime is 1223445683. The reversal of 1223445680 is 865443221.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1223445680.

It is not an unprimeable number, because it can be changed into a prime (1223445683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47891 + ... + 68850.

Almost surely, 2^1223445680 is an apocalyptic number.

1223445680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223445680 is an abundant number, since it is smaller than the sum of its proper divisors (1642803904).

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

1223445680 is a wasteful number, since it uses less digits than its factorization.

1223445680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116885 (or 116879 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 35.

The square root of 1223445680 is about 34977.7883806281. The cubic root of 1223445680 is about 1069.5347440108.

The spelling of 1223445680 in words is "one billion, two hundred twenty-three million, four hundred forty-five thousand, six hundred eighty".