613638 has 24 divisors (see below), whose sum is σ = 1350648. Its totient is φ = 201312.

The previous prime is 613637. The next prime is 613651. The reversal of 613638 is 836316.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1081 + ... + 1547.

It is an arithmetic number, because the mean of its divisors is an integer number (56277).

2⁶¹³⁶³⁸ is an apocalyptic number.

613638 is an abundant number, since it is smaller than the sum of its proper divisors (737010).

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

613638 is a wasteful number, since it uses less digits than its factorization.

613638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548 (or 545 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 613638 is about 783.3504962659. The cubic root of 613638 is about 84.9775257768.

The spelling of 613638 in words is "six hundred thirteen thousand, six hundred thirty-eight".