2153768728 has 32 divisors (see below), whose sum is σ = 4083206400. Its totient is φ = 1064943648.

The previous prime is 2153768717. The next prime is 2153768759. The reversal of 2153768728 is 8278673512.

It is a congruent number.

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, 808663 + ... + 811321.

It is an arithmetic number, because the mean of its divisors is an integer number (127600200).

Almost surely, 2^2153768728 is an apocalyptic number.

It is an amenable number.

2153768728 is a deficient number, since it is larger than the sum of its proper divisors (1929437672).

2153768728 is a wasteful number, since it uses less digits than its factorization.

2153768728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3751 (or 3747 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 49.

The square root of 2153768728 is about 46408.7139231416. The cubic root of 2153768728 is about 1291.4165733841.

The spelling of 2153768728 in words is "two billion, one hundred fifty-three million, seven hundred sixty-eight thousand, seven hundred twenty-eight".