2745487872 has 120 divisors (see below), whose sum is σ = 8217505296. Its totient is φ = 915121152.

The previous prime is 2745487867. The next prime is 2745487873. The reversal of 2745487872 is 2787845472.

2745487872 is a `hidden beast` number, since 27 + 4 + 548 + 7 + 8 + 72 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (2745487873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113383 + ... + 135449.

Almost surely, 2^2745487872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2745487872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4108752648).

2745487872 is an abundant number, since it is smaller than the sum of its proper divisors (5472017424).

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

2745487872 is an frugal number, since it uses more digits than its factorization.

2745487872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22100 (or 22072 counting only the distinct ones).

The product of its digits is 7024640, while the sum is 54.

The square root of 2745487872 is about 52397.4032944382. The cubic root of 2745487872 is about 1400.2529937346.

The spelling of 2745487872 in words is "two billion, seven hundred forty-five million, four hundred eighty-seven thousand, eight hundred seventy-two".