1188013420 has 72 divisors (see below), whose sum is σ = 2819155248. Its totient is φ = 417043200.

The previous prime is 1188013373. The next prime is 1188013423. The reversal of 1188013420 is 243108811.

It is a super-2 number, since 2×1188013420² = 2822751772200192800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1188013423) by changing a digit.

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, 181810 + ... + 188230.

It is an arithmetic number, because the mean of its divisors is an integer number (39154934).

Almost surely, 2^1188013420 is an apocalyptic number.

1188013420 is a gapful number since it is divisible by the number (10) 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 1188013420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1409577624).

1188013420 is an abundant number, since it is smaller than the sum of its proper divisors (1631141828).

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

1188013420 is a wasteful number, since it uses less digits than its factorization.

1188013420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6499 (or 6468 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 1188013420 is about 34467.5705555236. The cubic root of 1188013420 is about 1059.1084885689.

It can be divided in two parts, 118801 and 3420, that added together give a palindrome (122221).

The spelling of 1188013420 in words is "one billion, one hundred eighty-eight million, thirteen thousand, four hundred twenty".