491862280 has 128 divisors (see below), whose sum is σ = 1372089600. Its totient is φ = 154524672.

The previous prime is 491862271. The next prime is 491862307. The reversal of 491862280 is 82268194.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 592906 + ... + 593734.

It is an arithmetic number, because the mean of its divisors is an integer number (10719450).

Almost surely, 2^491862280 is an apocalyptic number.

491862280 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 491862280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (686044800).

491862280 is an abundant number, since it is smaller than the sum of its proper divisors (880227320).

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

491862280 is a wasteful number, since it uses less digits than its factorization.

491862280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023 (or 1019 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 40.

The square root of 491862280 is about 22177.9683469880. The cubic root of 491862280 is about 789.3710103137.

The spelling of 491862280 in words is "four hundred ninety-one million, eight hundred sixty-two thousand, two hundred eighty".