1187888 has 20 divisors (see below), whose sum is σ = 2479008. Its totient is φ = 548160.

The previous prime is 1187887. The next prime is 1187897. The reversal of 1187888 is 8887811.

It is a super-2 number, since 2×1187888² = 2822155801088, which contains 22 as substring.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (1187887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2648 + ... + 3063.

2^1187888 is an apocalyptic number.

It is an amenable number.

1187888 is an abundant number, since it is smaller than the sum of its proper divisors (1291120).

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

1187888 is a wasteful number, since it uses less digits than its factorization.

1187888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5732 (or 5726 counting only the distinct ones).

The product of its digits is 28672, while the sum is 41.

The square root of 1187888 is about 1089.9027479551. The cubic root of 1187888 is about 105.9071216807.

The spelling of 1187888 in words is "one million, one hundred eighty-seven thousand, eight hundred eighty-eight".