1170143280 has 320 divisors, whose sum is σ = 4208480640. Its totient is φ = 298598400.

The previous prime is 1170143257. The next prime is 1170143287. The reversal of 1170143280 is 823410711.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1170143287) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6464790 + ... + 6464970.

It is an arithmetic number, because the mean of its divisors is an integer number (13151502).

Almost surely, 2^1170143280 is an apocalyptic number.

1170143280 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 1170143280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2104240320).

1170143280 is an abundant number, since it is smaller than the sum of its proper divisors (3038337360).

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

1170143280 is a wasteful number, since it uses less digits than its factorization.

1170143280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 1170143280 is about 34207.3571034069. The cubic root of 1170143280 is about 1053.7712550012.

Adding to 1170143280 its reverse (823410711), we get a palindrome (1993553991).

The spelling of 1170143280 in words is "one billion, one hundred seventy million, one hundred forty-three thousand, two hundred eighty".