1188778 has 16 divisors (see below), whose sum is σ = 1907136. Its totient is φ = 554400.

The previous prime is 1188769. The next prime is 1188787. The reversal of 1188778 is 8778811.

1188778 is nontrivially palindromic in base 5.

It is an interprime number because it is at equal distance from previous prime (1188769) and next prime (1188787).

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 1188778.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1678 + ... + 2278.

It is an arithmetic number, because the mean of its divisors is an integer number (119196).

2^1188778 is an apocalyptic number.

1188778 is a deficient number, since it is larger than the sum of its proper divisors (718358).

1188778 is a wasteful number, since it uses less digits than its factorization.

1188778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669.

The product of its digits is 25088, while the sum is 40.

The square root of 1188778 is about 1090.3109648169. The cubic root of 1188778 is about 105.9335646360.

The spelling of 1188778 in words is "one million, one hundred eighty-eight thousand, seven hundred seventy-eight".