1181396016 has 120 divisors (see below), whose sum is σ = 3460351440. Its totient is φ = 390168576.

The previous prime is 1181396009. The next prime is 1181396033. The reversal of 1181396016 is 6106931811.

It is a happy number.

1181396016 is a `hidden beast` number, since 1 + 18 + 1 + 39 + 601 + 6 = 666.

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

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 23 ways as a sum of consecutive naturals, for example, 438000 + ... + 440688.

It is an arithmetic number, because the mean of its divisors is an integer number (28836262).

Almost surely, 2^1181396016 is an apocalyptic number.

1181396016 is a gapful number since it is divisible by the number (16) 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 1181396016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1730175720).

1181396016 is an abundant number, since it is smaller than the sum of its proper divisors (2278955424).

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

1181396016 is a wasteful number, since it uses less digits than its factorization.

1181396016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2825 (or 2807 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 1181396016 is about 34371.4418667591. The cubic root of 1181396016 is about 1057.1383643484.

The spelling of 1181396016 in words is "one billion, one hundred eighty-one million, three hundred ninety-six thousand, sixteen".