1185681964 has 12 divisors (see below), whose sum is σ = 2087369424. Its totient is φ = 589290704.

The previous prime is 1185681943. The next prime is 1185681967. The reversal of 1185681964 is 4691865811.

It is not an unprimeable number, because it can be changed into a prime (1185681967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 886819 + ... + 888154.

It is an arithmetic number, because the mean of its divisors is an integer number (173947452).

Almost surely, 2^1185681964 is an apocalyptic number.

It is an amenable number.

1185681964 is a deficient number, since it is larger than the sum of its proper divisors (901687460).

1185681964 is a wasteful number, since it uses less digits than its factorization.

1185681964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775144 (or 1775142 counting only the distinct ones).

The product of its digits is 414720, while the sum is 49.

The square root of 1185681964 is about 34433.7329373392. The cubic root of 1185681964 is about 1058.4152074272.

The spelling of 1185681964 in words is "one billion, one hundred eighty-five million, six hundred eighty-one thousand, nine hundred sixty-four".