28304336277 has 16 divisors (see below), whose sum is σ = 47922686080. Its totient is φ = 16173906336.

The previous prime is 28304336273. The next prime is 28304336311. The reversal of 28304336277 is 77263340382.

28304336277 is a `hidden beast` number, since 2 + 8 + 304 + 336 + 2 + 7 + 7 = 666.

It is not a de Polignac number, because 28304336277 - 2² = 28304336273 is a prime.

It is a super-2 number, since 2×28304336277² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28304336273) 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, 74879008 + ... + 74879385.

It is an arithmetic number, because the mean of its divisors is an integer number (2995167880).

Almost surely, 2^28304336277 is an apocalyptic number.

28304336277 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

28304336277 is a deficient number, since it is larger than the sum of its proper divisors (19618349803).

28304336277 is a wasteful number, since it uses less digits than its factorization.

28304336277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149758409 (or 149758403 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 45.

The spelling of 28304336277 in words is "twenty-eight billion, three hundred four million, three hundred thirty-six thousand, two hundred seventy-seven".