613556240 has 80 divisors (see below), whose sum is σ = 1577684736. Its totient is φ = 220032000.

The previous prime is 613556233. The next prime is 613556261. The reversal of 613556240 is 42655316.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 613556197 and 613556206.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59465 + ... + 69015.

Almost surely, 2^613556240 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 613556240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (788842368).

613556240 is an abundant number, since it is smaller than the sum of its proper divisors (964128496).

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

613556240 is a wasteful number, since it uses less digits than its factorization.

613556240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9648 (or 9642 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 613556240 is about 24770.0674201747. The cubic root of 613556240 is about 849.7375152607.

The spelling of 613556240 in words is "six hundred thirteen million, five hundred fifty-six thousand, two hundred forty".