1613211328 has 56 divisors (see below), whose sum is σ = 3400086672. Its totient is φ = 756793344.

The previous prime is 1613211319. The next prime is 1613211331. The reversal of 1613211328 is 8231123161.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1613211296 and 1613211305.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 375400 + ... + 379672.

Almost surely, 2^1613211328 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 1613211328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1700043336).

1613211328 is an abundant number, since it is smaller than the sum of its proper divisors (1786875344).

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

1613211328 is a wasteful number, since it uses less digits than its factorization.

1613211328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4649 (or 4639 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 1613211328 is about 40164.8021033342. The cubic root of 1613211328 is about 1172.8174551506.

Adding to 1613211328 its reverse (8231123161), we get a palindrome (9844334489).

The spelling of 1613211328 in words is "one billion, six hundred thirteen million, two hundred eleven thousand, three hundred twenty-eight".