491439960 has 160 divisors (see below), whose sum is σ = 1802077200. Its totient is φ = 119128320.

The previous prime is 491439937. The next prime is 491439967. The reversal of 491439960 is 69934194.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491439967) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 28746 + ... + 42534.

Almost surely, 2^491439960 is an apocalyptic number.

491439960 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491439960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (901038600).

491439960 is an abundant number, since it is smaller than the sum of its proper divisors (1310637240).

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

491439960 is a wasteful number, since it uses less digits than its factorization.

491439960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13823 (or 13810 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 491439960 is about 22168.4451416873. The cubic root of 491439960 is about 789.1450238704.

The spelling of 491439960 in words is "four hundred ninety-one million, four hundred thirty-nine thousand, nine hundred sixty".