428491 has 8 divisors (see below), whose sum is σ = 501984. Its totient is φ = 358080.

The previous prime is 428489. The next prime is 428503. The reversal of 428491 is 194824.

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

It is a cyclic number.

It is not a de Polignac number, because 428491 - 2¹ = 428489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428401) 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, 460 + ... + 1033.

It is an arithmetic number, because the mean of its divisors is an integer number (62748).

2⁴²⁸⁴⁹¹ is an apocalyptic number.

428491 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

428491 is a deficient number, since it is larger than the sum of its proper divisors (73493).

428491 is a wasteful number, since it uses less digits than its factorization.

428491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1541.

The product of its digits is 2304, while the sum is 28.

The square root of 428491 is about 654.5922394896. The cubic root of 428491 is about 75.3900274577.

It can be divided in two parts, 428 and 491, that added together give a palindrome (919).

The spelling of 428491 in words is "four hundred twenty-eight thousand, four hundred ninety-one".