491204 has 24 divisors (see below), whose sum is σ = 1003968. Its totient is φ = 205920.

The previous prime is 491201. The next prime is 491213. The reversal of 491204 is 402194.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (491201) 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, 1319 + ... + 1649.

It is an arithmetic number, because the mean of its divisors is an integer number (41832).

2⁴⁹¹²⁰⁴ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491204, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (501984).

491204 is an abundant number, since it is smaller than the sum of its proper divisors (512764).

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

491204 is a wasteful number, since it uses less digits than its factorization.

491204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 491204 is about 700.8594723623. The cubic root of 491204 is about 78.9018703611.

Adding to 491204 its reverse (402194), we get a palindrome (893398).

It can be divided in two parts, 49 and 1204, that multiplied together give a triangular number (58996 = T₃₄₃).

The spelling of 491204 in words is "four hundred ninety-one thousand, two hundred four".