1213443408 has 80 divisors (see below), whose sum is σ = 3330429696. Its totient is φ = 379392000.

The previous prime is 1213443403. The next prime is 1213443409. The reversal of 1213443408 is 8043443121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213443401) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 253033 + ... + 257783.

Almost surely, 2^1213443408 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 1213443408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1665214848).

1213443408 is an abundant number, since it is smaller than the sum of its proper divisors (2116986288).

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

1213443408 is a wasteful number, since it uses less digits than its factorization.

1213443408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5092 (or 5086 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 1213443408 is about 34834.5146083593. The cubic root of 1213443408 is about 1066.6121067579.

Adding to 1213443408 its reverse (8043443121), we get a palindrome (9256886529).

The spelling of 1213443408 in words is "one billion, two hundred thirteen million, four hundred forty-three thousand, four hundred eight".