613657420 has 24 divisors (see below), whose sum is σ = 1291059504. Its totient is φ = 245009856.

The previous prime is 613657409. The next prime is 613657423. The reversal of 613657420 is 24756316.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (613657423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17107 + ... + 38986.

It is an arithmetic number, because the mean of its divisors is an integer number (53794146).

Almost surely, 2^613657420 is an apocalyptic number.

It is an amenable number.

613657420 is an abundant number, since it is smaller than the sum of its proper divisors (677402084).

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

613657420 is a wasteful number, since it uses less digits than its factorization.

613657420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56649 (or 56647 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 34.

The square root of 613657420 is about 24772.1097204094. The cubic root of 613657420 is about 849.7842220446.

The spelling of 613657420 in words is "six hundred thirteen million, six hundred fifty-seven thousand, four hundred twenty".