2291554728 has 24 divisors (see below), whose sum is σ = 6206294250. Its totient is φ = 763851552.

The previous prime is 2291554711. The next prime is 2291554757. The reversal of 2291554728 is 8274551922.

2291554728 is a `hidden beast` number, since 2 + 2 + 91 + 554 + 7 + 2 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1354092804 + 937461924 = 36798^2 + 30618^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15913503 + ... + 15913646.

Almost surely, 2^2291554728 is an apocalyptic number.

It is an amenable number.

2291554728 is an abundant number, since it is smaller than the sum of its proper divisors (3914739522).

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

2291554728 is a wasteful number, since it uses less digits than its factorization.

2291554728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31827161 (or 31827154 counting only the distinct ones).

The product of its digits is 403200, while the sum is 45.

The square root of 2291554728 is about 47870.1862122971. The cubic root of 2291554728 is about 1318.3885155593.

The spelling of 2291554728 in words is "two billion, two hundred ninety-one million, five hundred fifty-four thousand, seven hundred twenty-eight".