428434 has 8 divisors (see below), whose sum is σ = 680508. Its totient is φ = 201600.

The previous prime is 428429. The next prime is 428471. The reversal of 428434 is 434824.

It can be written as a sum of positive squares in 2 ways, for example, as 426409 + 2025 = 653^2 + 45^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 428399 and 428408.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6267 + ... + 6334.

2⁴²⁸⁴³⁴ is an apocalyptic number.

428434 is a deficient number, since it is larger than the sum of its proper divisors (252074).

428434 is a wasteful number, since it uses less digits than its factorization.

428434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12620.

The product of its digits is 3072, while the sum is 25.

The square root of 428434 is about 654.5486994869. The cubic root of 428434 is about 75.3866843909.

The spelling of 428434 in words is "four hundred twenty-eight thousand, four hundred thirty-four".