1171660720 has 20 divisors (see below), whose sum is σ = 2724111360. Its totient is φ = 468664256.

The previous prime is 1171660657. The next prime is 1171660739. The reversal of 1171660720 is 270661711.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7322800 + ... + 7322959.

It is an arithmetic number, because the mean of its divisors is an integer number (136205568).

Almost surely, 2^1171660720 is an apocalyptic number.

1171660720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1171660720 is an abundant number, since it is smaller than the sum of its proper divisors (1552450640).

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

1171660720 is a wasteful number, since it uses less digits than its factorization.

1171660720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14645772 (or 14645766 counting only the distinct ones).

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 1171660720 is about 34229.5299412656. The cubic root of 1171660720 is about 1054.2265678873.

Subtracting from 1171660720 its reverse (270661711), we obtain a palindrome (900999009).

The spelling of 1171660720 in words is "one billion, one hundred seventy-one million, six hundred sixty thousand, seven hundred twenty".