2272738728 has 32 divisors (see below), whose sum is σ = 6118912800. Its totient is φ = 699304128.

The previous prime is 2272738717. The next prime is 2272738753. The reversal of 2272738728 is 8278372722.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

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, 3641898 + ... + 3642521.

It is an arithmetic number, because the mean of its divisors is an integer number (191216025).

Almost surely, 2^2272738728 is an apocalyptic number.

It is an amenable number.

2272738728 is an abundant number, since it is smaller than the sum of its proper divisors (3846174072).

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

2272738728 is a wasteful number, since it uses less digits than its factorization.

2272738728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7284441 (or 7284437 counting only the distinct ones).

The product of its digits is 1053696, while the sum is 48.

The square root of 2272738728 is about 47673.2496060422. The cubic root of 2272738728 is about 1314.7701561113.

The spelling of 2272738728 in words is "two billion, two hundred seventy-two million, seven hundred thirty-eight thousand, seven hundred twenty-eight".