428408 has 8 divisors (see below), whose sum is σ = 803280. Its totient is φ = 214200.

The previous prime is 428401. The next prime is 428411. The reversal of 428408 is 804824.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428401) by changing a digit.

428408 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26768 + ... + 26783.

It is an arithmetic number, because the mean of its divisors is an integer number (100410).

2⁴²⁸⁴⁰⁸ is an apocalyptic number.

It is an amenable number.

428408 is a deficient number, since it is larger than the sum of its proper divisors (374872).

428408 is a wasteful number, since it uses less digits than its factorization.

428408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53557 (or 53553 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 26.

The square root of 428408 is about 654.5288381729. The cubic root of 428408 is about 75.3851593848.

The spelling of 428408 in words is "four hundred twenty-eight thousand, four hundred eight".