1163218860 has 48 divisors (see below), whose sum is σ = 3618904800. Its totient is φ = 310191552.

The previous prime is 1163218853. The next prime is 1163218867. The reversal of 1163218860 is 688123611.

1163218860 is a `hidden beast` number, since 1 + 1 + 632 + 18 + 8 + 6 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1163218853) and next prime (1163218867).

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

It is not an unprimeable number, because it can be changed into a prime (1163218867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1076515 + ... + 1077594.

It is an arithmetic number, because the mean of its divisors is an integer number (75393850).

Almost surely, 2^1163218860 is an apocalyptic number.

1163218860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1163218860 is an abundant number, since it is smaller than the sum of its proper divisors (2455685940).

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

1163218860 is a wasteful number, since it uses less digits than its factorization.

1163218860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2154127 (or 2154119 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 1163218860 is about 34105.9944877730. The cubic root of 1163218860 is about 1051.6885484260.

The spelling of 1163218860 in words is "one billion, one hundred sixty-three million, two hundred eighteen thousand, eight hundred sixty".