28977647305 has 16 divisors (see below), whose sum is σ = 34950973824. Its totient is φ = 23063751040.

The previous prime is 28977647291. The next prime is 28977647311. The reversal of 28977647305 is 50374677982.

It is not a de Polignac number, because 28977647305 - 2⁵ = 28977647273 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28977647305.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1513140 + ... + 1532170.

It is an arithmetic number, because the mean of its divisors is an integer number (2184435864).

Almost surely, 2^28977647305 is an apocalyptic number.

It is an amenable number.

28977647305 is a deficient number, since it is larger than the sum of its proper divisors (5973326519).

28977647305 is a wasteful number, since it uses less digits than its factorization.

28977647305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20576.

The product of its (nonzero) digits is 17781120, while the sum is 58.

The spelling of 28977647305 in words is "twenty-eight billion, nine hundred seventy-seven million, six hundred forty-seven thousand, three hundred five".