1178864687 has 48 divisors (see below), whose sum is σ = 1631290752. Its totient is φ = 837305280.

The previous prime is 1178864653. The next prime is 1178864693. The reversal of 1178864687 is 7864688711.

It is not a de Polignac number, because 1178864687 - 2¹⁰ = 1178863663 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1178864647) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 580568 + ... + 582594.

It is an arithmetic number, because the mean of its divisors is an integer number (33985224).

Almost surely, 2^1178864687 is an apocalyptic number.

1178864687 is a deficient number, since it is larger than the sum of its proper divisors (452426065).

1178864687 is a wasteful number, since it uses less digits than its factorization.

1178864687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2148 (or 2141 counting only the distinct ones).

The product of its digits is 3612672, while the sum is 56.

The square root of 1178864687 is about 34334.5989782901. The cubic root of 1178864687 is about 1056.3827953809.

The spelling of 1178864687 in words is "one billion, one hundred seventy-eight million, eight hundred sixty-four thousand, six hundred eighty-seven".