2728078380 has 84 divisors (see below), whose sum is σ = 8589563472. Its totient is φ = 727483680.

The previous prime is 2728078361. The next prime is 2728078393. The reversal of 2728078380 is 838708272.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 78976 + ... + 108135.

It is an arithmetic number, because the mean of its divisors is an integer number (102256708).

Almost surely, 2^2728078380 is an apocalyptic number.

2728078380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2728078380 is an abundant number, since it is smaller than the sum of its proper divisors (5861485092).

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

2728078380 is a wasteful number, since it uses less digits than its factorization.

2728078380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187138 (or 187121 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The square root of 2728078380 is about 52231.0097547424. The cubic root of 2728078380 is about 1397.2869874376.

The spelling of 2728078380 in words is "two billion, seven hundred twenty-eight million, seventy-eight thousand, three hundred eighty".