1188784660 has 24 divisors (see below), whose sum is σ = 2853083520. Its totient is φ = 407583264.

The previous prime is 1188784607. The next prime is 1188784661. The reversal of 1188784660 is 664878811.

It is a happy number.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1188784661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4245520 + ... + 4245799.

It is an arithmetic number, because the mean of its divisors is an integer number (118878480).

Almost surely, 2^1188784660 is an apocalyptic number.

1188784660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1188784660 is an abundant number, since it is smaller than the sum of its proper divisors (1664298860).

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

1188784660 is a wasteful number, since it uses less digits than its factorization.

1188784660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8491335 (or 8491333 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 49.

The square root of 1188784660 is about 34478.7566481160. The cubic root of 1188784660 is about 1059.3376246273.

The spelling of 1188784660 in words is "one billion, one hundred eighty-eight million, seven hundred eighty-four thousand, six hundred sixty".