613512240 has 80 divisors (see below), whose sum is σ = 2074795776. Its totient is φ = 148729600.

The previous prime is 613512217. The next prime is 613512241. The reversal of 613512240 is 42215316.

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

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 613512240.

It is not an unprimeable number, because it can be changed into a prime (613512241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113556 + ... + 118835.

Almost surely, 2^613512240 is an apocalyptic number.

613512240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

613512240 is an abundant number, since it is smaller than the sum of its proper divisors (1461283536).

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

613512240 is a wasteful number, since it uses less digits than its factorization.

613512240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232418 (or 232412 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 613512240 is about 24769.1792354935. The cubic root of 613512240 is about 849.7172023472.

Adding to 613512240 its reverse (42215316), we get a palindrome (655727556).

The spelling of 613512240 in words is "six hundred thirteen million, five hundred twelve thousand, two hundred forty".