1188268812 has 108 divisors (see below), whose sum is σ = 3213308280. Its totient is φ = 379730160.

The previous prime is 1188268811. The next prime is 1188268813. The reversal of 1188268812 is 2188628811.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is an interprime number because it is at equal distance from previous prime (1188268811) and next prime (1188268813).

It is a tau number, because it is divible by the number of its divisors (108).

It is not an unprimeable number, because it can be changed into a prime (1188268811) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 11105263 + ... + 11105369.

Almost surely, 2^1188268812 is an apocalyptic number.

1188268812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1188268812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1606654140).

1188268812 is an abundant number, since it is smaller than the sum of its proper divisors (2025039468).

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

1188268812 is a wasteful number, since it uses less digits than its factorization.

1188268812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289 (or 143 counting only the distinct ones).

The product of its digits is 98304, while the sum is 45.

The square root of 1188268812 is about 34471.2751722358. The cubic root of 1188268812 is about 1059.1843767281.

The spelling of 1188268812 in words is "one billion, one hundred eighty-eight million, two hundred sixty-eight thousand, eight hundred twelve".