1113397680 has 80 divisors (see below), whose sum is σ = 3456787680. Its totient is φ = 296454144.

The previous prime is 1113397669. The next prime is 1113397687. The reversal of 1113397680 is 867933111.

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (1113397687) 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 15 ways as a sum of consecutive naturals, for example, 172756 + ... + 179084.

It is an arithmetic number, because the mean of its divisors is an integer number (43209846).

Almost surely, 2^1113397680 is an apocalyptic number.

1113397680 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 1113397680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1728393840).

1113397680 is an abundant number, since it is smaller than the sum of its proper divisors (2343390000).

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

1113397680 is a wasteful number, since it uses less digits than its factorization.

1113397680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7078 (or 7072 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 39.

The square root of 1113397680 is about 33367.6142389593. The cubic root of 1113397680 is about 1036.4541719502.

The spelling of 1113397680 in words is "one billion, one hundred thirteen million, three hundred ninety-seven thousand, six hundred eighty".