1491118224 has 80 divisors (see below), whose sum is σ = 3952872000. Its totient is φ = 484098048.

The previous prime is 1491118219. The next prime is 1491118249. The reversal of 1491118224 is 4228111941.

It is a Cunningham number, because it is equal to 38615²-1.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 925932 + ... + 927540.

It is an arithmetic number, because the mean of its divisors is an integer number (49410900).

Almost surely, 2^1491118224 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 1491118224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1976436000).

1491118224 is an abundant number, since it is smaller than the sum of its proper divisors (2461753776).

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

1491118224 is a wasteful number, since it uses less digits than its factorization.

1491118224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112 (or 2106 counting only the distinct ones).

The product of its digits is 4608, while the sum is 33.

The square root of 1491118224 is about 38614.9999870517. Note that the first 4 decimals coincide. The cubic root of 1491118224 is about 1142.4504139221.

The spelling of 1491118224 in words is "one billion, four hundred ninety-one million, one hundred eighteen thousand, two hundred twenty-four".