13213435428 has 144 divisors (see below), whose sum is σ = 35122703616. Its totient is φ = 4184248320.

The previous prime is 13213435409. The next prime is 13213435429. The reversal of 13213435428 is 82453431231.

13213435428 is a `hidden beast` number, since 1 + 3 + 213 + 435 + 4 + 2 + 8 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 13213435392 and 13213435401.

It is not an unprimeable number, because it can be changed into a prime (13213435429) 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 47 ways as a sum of consecutive naturals, for example, 14041438 + ... + 14042378.

It is an arithmetic number, because the mean of its divisors is an integer number (243907664).

Almost surely, 2^13213435428 is an apocalyptic number.

13213435428 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 13213435428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17561351808).

13213435428 is an abundant number, since it is smaller than the sum of its proper divisors (21909268188).

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

13213435428 is a wasteful number, since it uses less digits than its factorization.

13213435428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234 (or 1229 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

Adding to 13213435428 its reverse (82453431231), we get a palindrome (95666866659).

The spelling of 13213435428 in words is "thirteen billion, two hundred thirteen million, four hundred thirty-five thousand, four hundred twenty-eight".