428998 has 4 divisors (see below), whose sum is σ = 643500. Its totient is φ = 214498.

The previous prime is 428977. The next prime is 429007. The reversal of 428998 is 899824.

It is a happy number.

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

It is a self number, because there is not a number n which added to its sum of digits gives 428998.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107248 + ... + 107251.

It is an arithmetic number, because the mean of its divisors is an integer number (160875).

2⁴²⁸⁹⁹⁸ is an apocalyptic number.

428998 is a deficient number, since it is larger than the sum of its proper divisors (214502).

428998 is a wasteful number, since it uses less digits than its factorization.

428998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214501.

The product of its digits is 41472, while the sum is 40.

The square root of 428998 is about 654.9793889887. The cubic root of 428998 is about 75.4197501190.

The spelling of 428998 in words is "four hundred twenty-eight thousand, nine hundred ninety-eight".