2491399060 has 12 divisors (see below), whose sum is σ = 5231938068. Its totient is φ = 996559616.

The previous prime is 2491399049. The next prime is 2491399067. The reversal of 2491399060 is 609931942.

It can be written as a sum of positive squares in 2 ways, for example, as 512750736 + 1978648324 = 22644^2 + 44482^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2491398998 and 2491399016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2491399067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62284957 + ... + 62284996.

It is an arithmetic number, because the mean of its divisors is an integer number (435994839).

Almost surely, 2^2491399060 is an apocalyptic number.

2491399060 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2491399060 is an abundant number, since it is smaller than the sum of its proper divisors (2740539008).

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

2491399060 is a wasteful number, since it uses less digits than its factorization.

2491399060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124569962 (or 124569960 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 2491399060 is about 49913.9164963039. The cubic root of 2491399060 is about 1355.6505837658.

The spelling of 2491399060 in words is "two billion, four hundred ninety-one million, three hundred ninety-nine thousand, sixty".