1188236240 has 20 divisors (see below), whose sum is σ = 2762649444. Its totient is φ = 475294464.

The previous prime is 1188236239. The next prime is 1188236249. The reversal of 1188236240 is 426328811.

1188236240 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 586220944 + 602015296 = 24212^2 + 24536^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 1188236240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1188236249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7426397 + ... + 7426556.

Almost surely, 2^1188236240 is an apocalyptic number.

1188236240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1188236240 is an abundant number, since it is smaller than the sum of its proper divisors (1574413204).

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

1188236240 is a wasteful number, since it uses less digits than its factorization.

1188236240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14852966 (or 14852960 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 1188236240 is about 34470.8027176624. The cubic root of 1188236240 is about 1059.1746987640.

The spelling of 1188236240 in words is "one billion, one hundred eighty-eight million, two hundred thirty-six thousand, two hundred forty".