1163393280 has 540 divisors, whose sum is σ = 4863626460. Its totient is φ = 264757248.

The previous prime is 1163393269. The next prime is 1163393311. The reversal of 1163393280 is 823933611.

1163393280 is a `hidden beast` number, since 11 + 633 + 9 + 3 + 2 + 8 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 796594176 + 366799104 = 28224^2 + 19152^2 .

It is a tau number, because it is divible by the number of its divisors (540).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 5080206 + ... + 5080434.

Almost surely, 2^1163393280 is an apocalyptic number.

1163393280 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 1163393280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2431813230).

1163393280 is an abundant number, since it is smaller than the sum of its proper divisors (3700233180).

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

1163393280 is an equidigital number, since it uses as much as digits as its factorization.

1163393280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 1163393280 is about 34108.5514204283. The cubic root of 1163393280 is about 1051.7411112913.

The spelling of 1163393280 in words is "one billion, one hundred sixty-three million, three hundred ninety-three thousand, two hundred eighty".