28418978275 has 6 divisors (see below), whose sum is σ = 35239533092. Its totient is φ = 22735182600.

The previous prime is 28418978249. The next prime is 28418978293. The reversal of 28418978275 is 57287981482.

It is not a de Polignac number, because 28418978275 - 2¹¹ = 28418976227 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 568379541 + ... + 568379590.

Almost surely, 2^28418978275 is an apocalyptic number.

28418978275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28418978275 is a deficient number, since it is larger than the sum of its proper divisors (6820554817).

28418978275 is a wasteful number, since it uses less digits than its factorization.

28418978275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1136759141 (or 1136759136 counting only the distinct ones).

The product of its digits is 18063360, while the sum is 61.

The spelling of 28418978275 in words is "twenty-eight billion, four hundred eighteen million, nine hundred seventy-eight thousand, two hundred seventy-five".