1181946870 has 256 divisors, whose sum is σ = 3677184000. Its totient is φ = 267618816.

The previous prime is 1181946859. The next prime is 1181946877. The reversal of 1181946870 is 786491811.

It is a happy number.

1181946870 is a `hidden beast` number, since 1 + 181 + 9 + 468 + 7 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1181946877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 2467291 + ... + 2467769.

It is an arithmetic number, because the mean of its divisors is an integer number (14364000).

Almost surely, 2^1181946870 is an apocalyptic number.

1181946870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1181946870, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1838592000).

1181946870 is an abundant number, since it is smaller than the sum of its proper divisors (2495237130).

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

1181946870 is a wasteful number, since it uses less digits than its factorization.

1181946870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564 (or 558 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 45.

The square root of 1181946870 is about 34379.4541841490. The cubic root of 1181946870 is about 1057.3026441224.

The spelling of 1181946870 in words is "one billion, one hundred eighty-one million, nine hundred forty-six thousand, eight hundred seventy".