428437 has 4 divisors (see below), whose sum is σ = 434380. Its totient is φ = 422496.

The previous prime is 428429. The next prime is 428471. The reversal of 428437 is 734824.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 130321 + 298116 = 361^2 + 546^2 .

It is a cyclic number.

It is not a de Polignac number, because 428437 - 2³ = 428429 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428137) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2862 + ... + 3007.

It is an arithmetic number, because the mean of its divisors is an integer number (108595).

2⁴²⁸⁴³⁷ is an apocalyptic number.

It is an amenable number.

428437 is a deficient number, since it is larger than the sum of its proper divisors (5943).

428437 is an equidigital number, since it uses as much as digits as its factorization.

428437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5942.

The product of its digits is 5376, while the sum is 28.

The square root of 428437 is about 654.5509911382. The cubic root of 428437 is about 75.3868603492.

It can be divided in two parts, 4 and 28437, that added together give a triangular number (28441 = T₂₃₈).

The spelling of 428437 in words is "four hundred twenty-eight thousand, four hundred thirty-seven".