613232240 has 80 divisors (see below), whose sum is σ = 1457049600. Its totient is φ = 239965440.

The previous prime is 613232237. The next prime is 613232261. The reversal of 613232240 is 42232316.

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

It is a congruent number.

It is an unprimeable number.

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, 1023461 + ... + 1024059.

It is an arithmetic number, because the mean of its divisors is an integer number (18213120).

Almost surely, 2^613232240 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 613232240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (728524800).

613232240 is an abundant number, since it is smaller than the sum of its proper divisors (843817360).

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

613232240 is a wasteful number, since it uses less digits than its factorization.

613232240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870 (or 864 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 613232240 is about 24763.5264047752. The cubic root of 613232240 is about 849.5879155919.

Adding to 613232240 its reverse (42232316), we get a palindrome (655464556).

The spelling of 613232240 in words is "six hundred thirteen million, two hundred thirty-two thousand, two hundred forty".