428742 has 12 divisors (see below), whose sum is σ = 928980. Its totient is φ = 142908.

The previous prime is 428741. The next prime is 428759. The reversal of 428742 is 247824.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428741) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11892 + ... + 11927.

It is an arithmetic number, because the mean of its divisors is an integer number (77415).

2⁴²⁸⁷⁴² is an apocalyptic number.

428742 is an abundant number, since it is smaller than the sum of its proper divisors (500238).

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

428742 is a wasteful number, since it uses less digits than its factorization.

428742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23827 (or 23824 counting only the distinct ones).

The product of its digits is 3584, while the sum is 27.

The square root of 428742 is about 654.7839338286. The cubic root of 428742 is about 75.4047451556.

The spelling of 428742 in words is "four hundred twenty-eight thousand, seven hundred forty-two".