28338886655 has 4 divisors (see below), whose sum is σ = 34006663992. Its totient is φ = 22671109320.

The previous prime is 28338886651. The next prime is 28338886721. The reversal of 28338886655 is 55668883382.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28338886655 - 2² = 28338886651 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 (28338886651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2833888661 + ... + 2833888670.

It is an arithmetic number, because the mean of its divisors is an integer number (8501665998).

Almost surely, 2^28338886655 is an apocalyptic number.

28338886655 is a deficient number, since it is larger than the sum of its proper divisors (5667777337).

28338886655 is an equidigital number, since it uses as much as digits as its factorization.

28338886655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5667777336.

The product of its digits is 66355200, while the sum is 62.

The spelling of 28338886655 in words is "twenty-eight billion, three hundred thirty-eight million, eight hundred eighty-six thousand, six hundred fifty-five".