28177739120 has 20 divisors (see below), whose sum is σ = 65513243640. Its totient is φ = 11271095616.

The previous prime is 28177739113. The next prime is 28177739131. The reversal of 28177739120 is 2193777182.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176110790 + ... + 176110949.

It is an arithmetic number, because the mean of its divisors is an integer number (3275662182).

Almost surely, 2^28177739120 is an apocalyptic number.

28177739120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28177739120 is an abundant number, since it is smaller than the sum of its proper divisors (37335504520).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28177739120 is a wasteful number, since it uses less digits than its factorization.

28177739120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352221752 (or 352221746 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 47.

The spelling of 28177739120 in words is "twenty-eight billion, one hundred seventy-seven million, seven hundred thirty-nine thousand, one hundred twenty".