2728565220 has 48 divisors (see below), whose sum is σ = 7642732608. Its totient is φ = 727355520.

The previous prime is 2728565219. The next prime is 2728565227. The reversal of 2728565220 is 225658272.

It is not an unprimeable number, because it can be changed into a prime (2728565227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 206410 + ... + 219230.

It is an arithmetic number, because the mean of its divisors is an integer number (159223596).

Almost surely, 2^2728565220 is an apocalyptic number.

2728565220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2728565220 is an abundant number, since it is smaller than the sum of its proper divisors (4914167388).

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

2728565220 is a wasteful number, since it uses less digits than its factorization.

2728565220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16380 (or 16378 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 39.

The square root of 2728565220 is about 52235.6699966603. The cubic root of 2728565220 is about 1397.3701002422.

The spelling of 2728565220 in words is "two billion, seven hundred twenty-eight million, five hundred sixty-five thousand, two hundred twenty".