28709044185 has 32 divisors (see below), whose sum is σ = 49321550592. Its totient is φ = 14207836160.

The previous prime is 28709044163. The next prime is 28709044211. The reversal of 28709044185 is 58144090782.

It is a happy number.

It is not a de Polignac number, because 28709044185 - 2²¹ = 28706947033 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 774744 + ... + 810953.

It is an arithmetic number, because the mean of its divisors is an integer number (1541298456).

Almost surely, 2^28709044185 is an apocalyptic number.

It is an amenable number.

28709044185 is a deficient number, since it is larger than the sum of its proper divisors (20612506407).

28709044185 is a wasteful number, since it uses less digits than its factorization.

28709044185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1585793.

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 28709044185 in words is "twenty-eight billion, seven hundred nine million, forty-four thousand, one hundred eighty-five".