613404 has 36 divisors (see below), whose sum is σ = 1692600. Its totient is φ = 185760.

The previous prime is 613381. The next prime is 613421. The reversal of 613404 is 404316.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 379 + ... + 1170.

2⁶¹³⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

613404 is an abundant number, since it is smaller than the sum of its proper divisors (1079196).

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

613404 is a wasteful number, since it uses less digits than its factorization.

613404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1570 (or 1565 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 613404 is about 783.2011235947. The cubic root of 613404 is about 84.9667228446.

The spelling of 613404 in words is "six hundred thirteen thousand, four hundred four".