428619 has 4 divisors (see below), whose sum is σ = 571496. Its totient is φ = 285744.

The previous prime is 428579. The next prime is 428629. The reversal of 428619 is 916824.

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

It is not a de Polignac number, because 428619 - 2¹⁵ = 395851 is a prime.

It is a super-2 number, since 2×428619² = 367428494322, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428629) 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, 71434 + ... + 71439.

It is an arithmetic number, because the mean of its divisors is an integer number (142874).

2⁴²⁸⁶¹⁹ is an apocalyptic number.

428619 is a deficient number, since it is larger than the sum of its proper divisors (142877).

428619 is a wasteful number, since it uses less digits than its factorization.

428619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142876.

The product of its digits is 3456, while the sum is 30.

The square root of 428619 is about 654.6900029785. The cubic root of 428619 is about 75.3975336152.

The spelling of 428619 in words is "four hundred twenty-eight thousand, six hundred nineteen".