428938 has 4 divisors (see below), whose sum is σ = 643410. Its totient is φ = 214468.

The previous prime is 428899. The next prime is 428951. The reversal of 428938 is 839824.

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

It can be written as a sum of positive squares in only one way, i.e., 223729 + 205209 = 473^2 + 453^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107233 + ... + 107236.

2⁴²⁸⁹³⁸ is an apocalyptic number.

428938 is a deficient number, since it is larger than the sum of its proper divisors (214472).

428938 is a wasteful number, since it uses less digits than its factorization.

428938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214471.

The product of its digits is 13824, while the sum is 34.

The square root of 428938 is about 654.9335844191. The cubic root of 428938 is about 75.4162338664.

The spelling of 428938 in words is "four hundred twenty-eight thousand, nine hundred thirty-eight".