655404 has 12 divisors (see below), whose sum is σ = 1529304. Its totient is φ = 218464.

The previous prime is 655399. The next prime is 655439. The reversal of 655404 is 404556.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27297 + ... + 27320.

It is an arithmetic number, because the mean of its divisors is an integer number (127442).

2⁶⁵⁵⁴⁰⁴ is an apocalyptic number.

It is an amenable number.

655404 is an abundant number, since it is smaller than the sum of its proper divisors (873900).

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

655404 is a wasteful number, since it uses less digits than its factorization.

655404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54624 (or 54622 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 655404 is about 809.5702563706. The cubic root of 655404 is about 86.8633076064.

The spelling of 655404 in words is "six hundred fifty-five thousand, four hundred four".