28297295277 has 8 divisors (see below), whose sum is σ = 39949122816. Its totient is φ = 17755165632.

The previous prime is 28297295263. The next prime is 28297295281. The reversal of 28297295277 is 77259279282.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28297295277 - 2¹² = 28297291181 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28297295277.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28297295237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 277424413 + ... + 277424514.

It is an arithmetic number, because the mean of its divisors is an integer number (4993640352).

Almost surely, 2^28297295277 is an apocalyptic number.

It is an amenable number.

28297295277 is a deficient number, since it is larger than the sum of its proper divisors (11651827539).

28297295277 is a wasteful number, since it uses less digits than its factorization.

28297295277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554848947.

The product of its digits is 17781120, while the sum is 60.

The spelling of 28297295277 in words is "twenty-eight billion, two hundred ninety-seven million, two hundred ninety-five thousand, two hundred seventy-seven".