1163278320 has 160 divisors (see below), whose sum is σ = 3685264128. Its totient is φ = 303489024.

The previous prime is 1163278273. The next prime is 1163278339. The reversal of 1163278320 is 238723611.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2490727 + ... + 2491193.

Almost surely, 2^1163278320 is an apocalyptic number.

1163278320 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 1163278320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1842632064).

1163278320 is an abundant number, since it is smaller than the sum of its proper divisors (2521985808).

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

1163278320 is a wasteful number, since it uses less digits than its factorization.

1163278320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687 (or 681 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 1163278320 is about 34106.8661709046. The cubic root of 1163278320 is about 1051.7064677639.

The spelling of 1163278320 in words is "one billion, one hundred sixty-three million, two hundred seventy-eight thousand, three hundred twenty".