2745223236 has 216 divisors, whose sum is σ = 8550831744. Its totient is φ = 738904320.

The previous prime is 2745223147. The next prime is 2745223241. The reversal of 2745223236 is 6323225472.

2745223236 is a `hidden beast` number, since 2 + 74 + 522 + 32 + 36 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2745223236.

It is an unprimeable number.

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 71 ways as a sum of consecutive naturals, for example, 2880136 + ... + 2881088.

It is an arithmetic number, because the mean of its divisors is an integer number (39587184).

Almost surely, 2^2745223236 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 2745223236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4275415872).

2745223236 is an abundant number, since it is smaller than the sum of its proper divisors (5805608508).

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

2745223236 is a wasteful number, since it uses less digits than its factorization.

2745223236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1071 (or 1059 counting only the distinct ones).

The product of its digits is 120960, while the sum is 36.

The square root of 2745223236 is about 52394.8779557697. The cubic root of 2745223236 is about 1400.2080024282.

The spelling of 2745223236 in words is "two billion, seven hundred forty-five million, two hundred twenty-three thousand, two hundred thirty-six".