491928 has 32 divisors (see below), whose sum is σ = 1248000. Its totient is φ = 161568.

The previous prime is 491923. The next prime is 491951. The reversal of 491928 is 829194.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491923) by changing a digit.

491928 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 7 ways as a sum of consecutive naturals, for example, 2373 + ... + 2571.

It is an arithmetic number, because the mean of its divisors is an integer number (39000).

2⁴⁹¹⁹²⁸ is an apocalyptic number.

It is an amenable number.

491928 is an abundant number, since it is smaller than the sum of its proper divisors (756072).

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

491928 is a wasteful number, since it uses less digits than its factorization.

491928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311 (or 307 counting only the distinct ones).

The product of its digits is 5184, while the sum is 33.

The square root of 491928 is about 701.3757908568. The cubic root of 491928 is about 78.9406165922.

The spelling of 491928 in words is "four hundred ninety-one thousand, nine hundred twenty-eight".