2491751728 has 20 divisors (see below), whose sum is σ = 4983504448. Its totient is φ = 1205686080.

The previous prime is 2491751711. The next prime is 2491751737. The reversal of 2491751728 is 8271571942.

2491751728 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2511351 + ... + 2512342.

Almost surely, 2^2491751728 is an apocalyptic number.

It is an amenable number.

2491751728 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2491751728 is a wasteful number, since it uses less digits than its factorization.

2491751728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5023732 (or 5023726 counting only the distinct ones).

The product of its digits is 282240, while the sum is 46.

The square root of 2491751728 is about 49917.4491335445. The cubic root of 2491751728 is about 1355.7145467590.

The spelling of 2491751728 in words is "two billion, four hundred ninety-one million, seven hundred fifty-one thousand, seven hundred twenty-eight".