904644 has 36 divisors (see below), whose sum is σ = 2463916. Its totient is φ = 278208.

The previous prime is 904643. The next prime is 904661. The reversal of 904644 is 446409.

It can be written as a sum of positive squares in 2 ways, for example, as 360000 + 544644 = 600^2 + 738^2 .

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

It is not an unprimeable number, because it can be changed into a prime (904643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 499 + ... + 1434.

2⁹⁰⁴⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

904644 is an abundant number, since it is smaller than the sum of its proper divisors (1559272).

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

904644 is a wasteful number, since it uses less digits than its factorization.

904644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1956 (or 1951 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 904644 is about 951.1277516717. The cubic root of 904644 is about 96.7147178203.

The spelling of 904644 in words is "nine hundred four thousand, six hundred forty-four".