1188138040 has 16 divisors (see below), whose sum is σ = 2673310680. Its totient is φ = 475255200.

The previous prime is 1188138037. The next prime is 1188138073. The reversal of 1188138040 is 408318811.

It is a junction number, because it is equal to n+sod(n) for n = 1188137987 and 1188138005.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14851686 + ... + 14851765.

Almost surely, 2^1188138040 is an apocalyptic number.

1188138040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1188138040 is an abundant number, since it is smaller than the sum of its proper divisors (1485172640).

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

1188138040 is a wasteful number, since it uses less digits than its factorization.

1188138040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29703462 (or 29703458 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 34.

The square root of 1188138040 is about 34469.3782943644. The cubic root of 1188138040 is about 1059.1455199926.

The spelling of 1188138040 in words is "one billion, one hundred eighty-eight million, one hundred thirty-eight thousand, forty".