1213350528 has 128 divisors (see below), whose sum is σ = 3511166400. Its totient is φ = 369008640.

The previous prime is 1213350521. The next prime is 1213350539. The reversal of 1213350528 is 8250533121.

It is a tau number, because it is divible by the number of its divisors (128).

It is a junction number, because it is equal to n+sod(n) for n = 1213350495 and 1213350504.

It is not an unprimeable number, because it can be changed into a prime (1213350521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 442923 + ... + 445653.

Almost surely, 2^1213350528 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 1213350528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1755583200).

1213350528 is an abundant number, since it is smaller than the sum of its proper divisors (2297815872).

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

1213350528 is a wasteful number, since it uses less digits than its factorization.

1213350528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2850 (or 2838 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 1213350528 is about 34833.1814223163. The cubic root of 1213350528 is about 1066.5848923422.

Adding to 1213350528 its reverse (8250533121), we get a palindrome (9463883649).

The spelling of 1213350528 in words is "one billion, two hundred thirteen million, three hundred fifty thousand, five hundred twenty-eight".