2491923784 has 32 divisors (see below), whose sum is σ = 5653946880. Its totient is φ = 1005145344.

The previous prime is 2491923773. The next prime is 2491923821. The reversal of 2491923784 is 4873291942.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1307832 + ... + 1309735.

It is an arithmetic number, because the mean of its divisors is an integer number (176685840).

Almost surely, 2^2491923784 is an apocalyptic number.

It is an amenable number.

2491923784 is an abundant number, since it is smaller than the sum of its proper divisors (3162023096).

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

2491923784 is a wasteful number, since it uses less digits than its factorization.

2491923784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2617597 (or 2617593 counting only the distinct ones).

The product of its digits is 870912, while the sum is 49.

The square root of 2491923784 is about 49919.1725091673. The cubic root of 2491923784 is about 1355.7457501691.

The spelling of 2491923784 in words is "two billion, four hundred ninety-one million, nine hundred twenty-three thousand, seven hundred eighty-four".