428849 has 4 divisors (see below), whose sum is σ = 451440. Its totient is φ = 406260.

The previous prime is 428843. The next prime is 428851. The reversal of 428849 is 948824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 428849 - 2⁴ = 428833 is a prime.

It is a super-2 number, since 2×428849² = 367822929602, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (428843) 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, 11267 + ... + 11304.

It is an arithmetic number, because the mean of its divisors is an integer number (112860).

2⁴²⁸⁸⁴⁹ is an apocalyptic number.

It is an amenable number.

428849 is a deficient number, since it is larger than the sum of its proper divisors (22591).

428849 is a wasteful number, since it uses less digits than its factorization.

428849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22590.

The product of its digits is 18432, while the sum is 35.

The square root of 428849 is about 654.8656350733. The cubic root of 428849 is about 75.4110174877.

The spelling of 428849 in words is "four hundred twenty-eight thousand, eight hundred forty-nine".