428404 has 6 divisors (see below), whose sum is σ = 749714.
Its totient is φ = 214200.
The previous prime is 428401. The next prime is 428411. The reversal of 428404 is 404824.
It can be written as a sum of positive squares in only one way, i.e., 252004 + 176400 = 502^2 + 420^2
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (428401) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53547 + ... + 53554.
2428404 is an apocalyptic number.
It is an amenable number.
428404 is a deficient number, since it is larger than the sum of its proper divisors (321310).
428404 is a wasteful number, since it uses less digits than its factorization.
428404 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 107105 (or 107103 counting only the distinct ones).
The product of its (nonzero) digits is 1024, while the sum is 22.
The square root of 428404 is about 654.5257825327.
The cubic root of 428404 is about 75.3849247630.
The spelling of 428404 in words is "four hundred twenty-eight thousand, four hundred four".