1173207280 has 80 divisors (see below), whose sum is σ = 3130674624. Its totient is φ = 400527360.

The previous prime is 1173207257. The next prime is 1173207283. The reversal of 1173207280 is 827023711.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1173207283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130614 + ... + 139306.

Almost surely, 2^1173207280 is an apocalyptic number.

1173207280 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 1173207280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1565337312).

1173207280 is an abundant number, since it is smaller than the sum of its proper divisors (1957467344).

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

1173207280 is a wasteful number, since it uses less digits than its factorization.

1173207280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8954 (or 8948 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 1173207280 is about 34252.1135114317. The cubic root of 1173207280 is about 1054.6902139943.

The spelling of 1173207280 in words is "one billion, one hundred seventy-three million, two hundred seven thousand, two hundred eighty".