1213816824 has 144 divisors (see below), whose sum is σ = 3804145800. Its totient is φ = 348416640.

The previous prime is 1213816801. The next prime is 1213816831. The reversal of 1213816824 is 4286183121.

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

It is a nude number because it is divisible by every one of its digits.

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 35 ways as a sum of consecutive naturals, for example, 161862 + ... + 169194.

Almost surely, 2^1213816824 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1213816824, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1902072900).

1213816824 is an abundant number, since it is smaller than the sum of its proper divisors (2590328976).

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

1213816824 is a wasteful number, since it uses less digits than its factorization.

1213816824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7386 (or 7368 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 1213816824 is about 34839.8740525852. The cubic root of 1213816824 is about 1066.7215059479.

Adding to 1213816824 its reverse (4286183121), we get a palindrome (5499999945).

The spelling of 1213816824 in words is "one billion, two hundred thirteen million, eight hundred sixteen thousand, eight hundred twenty-four".