428940 has 36 divisors (see below), whose sum is σ = 1301664. Its totient is φ = 114336.

The previous prime is 428899. The next prime is 428951. The reversal of 428940 is 49824.

It is a tau number, because it is divible by the number of its divisors (36).

It is an Ulam number.

It is an unprimeable number.

428940 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1012 + ... + 1371.

2⁴²⁸⁹⁴⁰ is an apocalyptic number.

It is an amenable number.

428940 is an abundant number, since it is smaller than the sum of its proper divisors (872724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428940 is a wasteful number, since it uses less digits than its factorization.

428940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2398 (or 2393 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 428940 is about 654.9351112897. The cubic root of 428940 is about 75.4163510801.

The spelling of 428940 in words is "four hundred twenty-eight thousand, nine hundred forty".