1163427840 has 256 divisors, whose sum is σ = 4152297600. Its totient is φ = 309067776.

The previous prime is 1163427821. The next prime is 1163427841. The reversal of 1163427840 is 487243611.

1163427840 is a `hidden beast` number, since 11 + 634 + 2 + 7 + 8 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (256).

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

It is a junction number, because it is equal to n+sod(n) for n = 1163427795 and 1163427804.

It is not an unprimeable number, because it can be changed into a prime (1163427841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4423549 + ... + 4423811.

Almost surely, 2^1163427840 is an apocalyptic number.

1163427840 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 1163427840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2076148800).

1163427840 is an abundant number, since it is smaller than the sum of its proper divisors (2988869760).

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

1163427840 is an frugal number, since it uses more digits than its factorization.

1163427840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307 (or 273 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 1163427840 is about 34109.0580344870. The cubic root of 1163427840 is about 1051.7515256008.

The spelling of 1163427840 in words is "one billion, one hundred sixty-three million, four hundred twenty-seven thousand, eight hundred forty".