2728443720 has 32 divisors (see below), whose sum is σ = 8185331520. Its totient is φ = 727584960.

The previous prime is 2728443709. The next prime is 2728443733. The reversal of 2728443720 is 273448272.

It is a Smith number, since the sum of its digits (39) 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, 11368396 + ... + 11368635.

It is an arithmetic number, because the mean of its divisors is an integer number (255791610).

Almost surely, 2^2728443720 is an apocalyptic number.

2728443720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2728443720 is an abundant number, since it is smaller than the sum of its proper divisors (5456887800).

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

2728443720 is a wasteful number, since it uses less digits than its factorization.

2728443720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22737045 (or 22737041 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 39.

The square root of 2728443720 is about 52234.5069853253. The cubic root of 2728443720 is about 1397.3493588178.

The spelling of 2728443720 in words is "two billion, seven hundred twenty-eight million, four hundred forty-three thousand, seven hundred twenty".