2272545640 has 16 divisors (see below), whose sum is σ = 5113227780. Its totient is φ = 909018240.

The previous prime is 2272545629. The next prime is 2272545643. The reversal of 2272545640 is 465452722.

It can be written as a sum of positive squares in 2 ways, for example, as 2224631556 + 47914084 = 47166^2 + 6922^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2272545640.

It is not an unprimeable number, because it can be changed into a prime (2272545643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28406781 + ... + 28406860.

Almost surely, 2^2272545640 is an apocalyptic number.

2272545640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2272545640 is an abundant number, since it is smaller than the sum of its proper divisors (2840682140).

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

2272545640 is a wasteful number, since it uses less digits than its factorization.

2272545640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56813652 (or 56813648 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 37.

The square root of 2272545640 is about 47671.2244441025. The cubic root of 2272545640 is about 1314.7329215147.

The spelling of 2272545640 in words is "two billion, two hundred seventy-two million, five hundred forty-five thousand, six hundred forty".