613621420 has 24 divisors (see below), whose sum is σ = 1289912400. Its totient is φ = 245199552.

The previous prime is 613621399. The next prime is 613621433. The reversal of 613621420 is 24126316.

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, 5326 + ... + 35434.

It is an arithmetic number, because the mean of its divisors is an integer number (53746350).

Almost surely, 2^613621420 is an apocalyptic number.

It is an amenable number.

613621420 is an abundant number, since it is smaller than the sum of its proper divisors (676290980).

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

613621420 is a wasteful number, since it uses less digits than its factorization.

613621420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31137 (or 31135 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 613621420 is about 24771.3830861339. The cubic root of 613621420 is about 849.7676042873.

Adding to 613621420 its reverse (24126316), we get a palindrome (637747736).

It can be divided in two parts, 6136 and 21420, that added together give a square (27556 = 166²).

The spelling of 613621420 in words is "six hundred thirteen million, six hundred twenty-one thousand, four hundred twenty".