28033755385 has 8 divisors (see below), whose sum is σ = 33652298376. Its totient is φ = 22419143040.

The previous prime is 28033755383. The next prime is 28033755401. The reversal of 28033755385 is 58355733082.

It can be written as a sum of positive squares in 4 ways, for example, as 460488681 + 27573266704 = 21459^2 + 166052^2 .

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

It is not a de Polignac number, because 28033755385 - 2¹ = 28033755383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28033755383) 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, 966946 + ... + 995515.

It is an arithmetic number, because the mean of its divisors is an integer number (4206537297).

Almost surely, 2^28033755385 is an apocalyptic number.

It is an amenable number.

28033755385 is a deficient number, since it is larger than the sum of its proper divisors (5618542991).

28033755385 is a wasteful number, since it uses less digits than its factorization.

28033755385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1965323.

The product of its (nonzero) digits is 3024000, while the sum is 49.

The spelling of 28033755385 in words is "twenty-eight billion, thirty-three million, seven hundred fifty-five thousand, three hundred eighty-five".