1188899855 has 32 divisors (see below), whose sum is σ = 1704568320. Its totient is φ = 784586880.

The previous prime is 1188899849. The next prime is 1188899891. The reversal of 1188899855 is 5589988811.

It is not a de Polignac number, because 1188899855 - 2¹⁸ = 1188637711 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28094 + ... + 56276.

It is an arithmetic number, because the mean of its divisors is an integer number (53267760).

Almost surely, 2^1188899855 is an apocalyptic number.

1188899855 is a deficient number, since it is larger than the sum of its proper divisors (515668465).

1188899855 is a wasteful number, since it uses less digits than its factorization.

1188899855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28271.

The product of its digits is 8294400, while the sum is 62.

The square root of 1188899855 is about 34480.4271290250. The cubic root of 1188899855 is about 1059.3718406521.

The spelling of 1188899855 in words is "one billion, one hundred eighty-eight million, eight hundred ninety-nine thousand, eight hundred fifty-five".