28977648807 has 8 divisors (see below), whose sum is σ = 39213534976. Its totient is φ = 19030097592.

The previous prime is 28977648769. The next prime is 28977648853. The reversal of 28977648807 is 70884677982.

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

It is not a de Polignac number, because 28977648807 - 2¹¹ = 28977646759 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28977648857) 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, 72083503 + ... + 72083904.

It is an arithmetic number, because the mean of its divisors is an integer number (4901691872).

Almost surely, 2^28977648807 is an apocalyptic number.

28977648807 is a deficient number, since it is larger than the sum of its proper divisors (10235886169).

28977648807 is a wasteful number, since it uses less digits than its factorization.

28977648807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144167477.

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

The spelling of 28977648807 in words is "twenty-eight billion, nine hundred seventy-seven million, six hundred forty-eight thousand, eight hundred seven".