428949 has 8 divisors (see below), whose sum is σ = 635520. Its totient is φ = 285948.

The previous prime is 428899. The next prime is 428951. The reversal of 428949 is 949824.

It is a happy number.

It is not a de Polignac number, because 428949 - 2⁸ = 428693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7917 + ... + 7970.

It is an arithmetic number, because the mean of its divisors is an integer number (79440).

2⁴²⁸⁹⁴⁹ is an apocalyptic number.

It is an amenable number.

428949 is a deficient number, since it is larger than the sum of its proper divisors (206571).

428949 is a wasteful number, since it uses less digits than its factorization.

428949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15896 (or 15890 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 428949 is about 654.9419821633. The cubic root of 428949 is about 75.4168785372.

The spelling of 428949 in words is "four hundred twenty-eight thousand, nine hundred forty-nine".