1201118688 has 144 divisors (see below), whose sum is σ = 4258590336. Its totient is φ = 311973120.

The previous prime is 1201118671. The next prime is 1201118693. The reversal of 1201118688 is 8868111021.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×1201118688² = 2885372205325682688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4906 + ... + 49257.

It is an arithmetic number, because the mean of its divisors is an integer number (29573544).

Almost surely, 2^1201118688 is an apocalyptic number.

1201118688 is a gapful number since it is divisible by the number (18) 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 1201118688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2129295168).

1201118688 is an abundant number, since it is smaller than the sum of its proper divisors (3057471648).

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

1201118688 is a wasteful number, since it uses less digits than its factorization.

1201118688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54197 (or 54186 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 36.

The square root of 1201118688 is about 34657.1592603895. The cubic root of 1201118688 is about 1062.9886842299.

The spelling of 1201118688 in words is "one billion, two hundred one million, one hundred eighteen thousand, six hundred eighty-eight".