428493 has 8 divisors (see below), whose sum is σ = 615328. Its totient is φ = 263664.

The previous prime is 428489. The next prime is 428503. The reversal of 428493 is 394824.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 428493 - 2² = 428489 is a prime.

It is a Duffinian number.

428493 is a lucky number.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 428493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428473) 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, 5455 + ... + 5532.

It is an arithmetic number, because the mean of its divisors is an integer number (76916).

2⁴²⁸⁴⁹³ is an apocalyptic number.

It is an amenable number.

428493 is a deficient number, since it is larger than the sum of its proper divisors (186835).

428493 is a wasteful number, since it uses less digits than its factorization.

428493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11003.

The product of its digits is 6912, while the sum is 30.

The square root of 428493 is about 654.5937671564. The cubic root of 428493 is about 75.3901447530.

The spelling of 428493 in words is "four hundred twenty-eight thousand, four hundred ninety-three".