• 904720² = 818518278400 is an anagram of the next square 904721² = 818520087841.

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904720 has 40 divisors (see below), whose sum is σ = 2160576. Its totient is φ = 352128.

The previous prime is 904697. The next prime is 904721. The reversal of 904720 is 27409.

It is a tau number, because it is divible by the number of its divisors (40).

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 904691 and 904700.

It is not an unprimeable number, because it can be changed into a prime (904721) 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, 3309 + ... + 3571.

2⁹⁰⁴⁷²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 904720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1080288).

904720 is an abundant number, since it is smaller than the sum of its proper divisors (1255856).

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

904720 is a wasteful number, since it uses less digits than its factorization.

904720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319 (or 313 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 904720 is about 951.1677034046. The cubic root of 904720 is about 96.7174261095.

The spelling of 904720 in words is "nine hundred four thousand, seven hundred twenty".