491600 has 30 divisors (see below), whose sum is σ = 1182030. Its totient is φ = 196480.

The previous prime is 491593. The next prime is 491611. The reversal of 491600 is 6194.

It can be written as a sum of positive squares in 3 ways, for example, as 150544 + 341056 = 388^2 + 584^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 215 + ... + 1014.

It is an arithmetic number, because the mean of its divisors is an integer number (39401).

2⁴⁹¹⁶⁰⁰ is an apocalyptic number.

491600 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

491600 is an abundant number, since it is smaller than the sum of its proper divisors (690430).

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

491600 is a wasteful number, since it uses less digits than its factorization.

491600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247 (or 1236 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 491600 is about 701.1419257183. The cubic root of 491600 is about 78.9230677645.

Adding to 491600 its reverse (6194), we get a palindrome (497794).

It can be divided in two parts, 49 and 1600, that multiplied together give a square (78400 = 280²).

The spelling of 491600 in words is "four hundred ninety-one thousand, six hundred".