2491388684 has 6 divisors (see below), whose sum is σ = 4359930204. Its totient is φ = 1245694340.

The previous prime is 2491388663. The next prime is 2491388689. The reversal of 2491388684 is 4868831942.

2491388684 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (2491388689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 311423582 + ... + 311423589.

It is an arithmetic number, because the mean of its divisors is an integer number (726655034).

Almost surely, 2^2491388684 is an apocalyptic number.

It is an amenable number.

2491388684 is a deficient number, since it is larger than the sum of its proper divisors (1868541520).

2491388684 is a wasteful number, since it uses less digits than its factorization.

2491388684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622847175 (or 622847173 counting only the distinct ones).

The product of its digits is 2654208, while the sum is 53.

The square root of 2491388684 is about 49913.8125572471. The cubic root of 2491388684 is about 1355.6487017911.

The spelling of 2491388684 in words is "two billion, four hundred ninety-one million, three hundred eighty-eight thousand, six hundred eighty-four".