2728190478387 has 18 divisors (see below), whose sum is σ = 3998385885676. Its totient is φ = 1653429702320.

The previous prime is 2728190478379. The next prime is 2728190478427. The reversal of 2728190478387 is 7838740918272.

It is not a de Polignac number, because 2728190478387 - 2³ = 2728190478379 is a prime.

It is a super-2 number, since 2×2728190478387² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2728190478367) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 31426213 + ... + 31512905.

Almost surely, 2^{2728190478387} is an apocalyptic number.

2728190478387 is a deficient number, since it is larger than the sum of its proper divisors (1270195407289).

2728190478387 is an frugal number, since it uses more digits than its factorization.

2728190478387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173411 (or 86707 counting only the distinct ones).

The product of its (nonzero) digits is 75866112, while the sum is 66.

The spelling of 2728190478387 in words is "two trillion, seven hundred twenty-eight billion, one hundred ninety million, four hundred seventy-eight thousand, three hundred eighty-seven".