491976 has 24 divisors (see below), whose sum is σ = 1332630. Its totient is φ = 163968.

The previous prime is 491969. The next prime is 491977. The reversal of 491976 is 679194.

It can be written as a sum of positive squares in only one way, i.e., 476100 + 15876 = 690^2 + 126^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 491976.

It is not an unprimeable number, because it can be changed into a prime (491977) by changing a digit.

491976 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 5 ways as a sum of consecutive naturals, for example, 3345 + ... + 3488.

2⁴⁹¹⁹⁷⁶ is an apocalyptic number.

It is an amenable number.

491976 is an abundant number, since it is smaller than the sum of its proper divisors (840654).

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

491976 is a wasteful number, since it uses less digits than its factorization.

491976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6845 (or 6838 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 491976 is about 701.4100084829. The cubic root of 491976 is about 78.9431840589.

It can be divided in two parts, 49 and 1976, that added together give a square (2025 = 45²).

The spelling of 491976 in words is "four hundred ninety-one thousand, nine hundred seventy-six".