28180447708 has 12 divisors (see below), whose sum is σ = 56360895472. Its totient is φ = 12077334720.

The previous prime is 28180447643. The next prime is 28180447747. The reversal of 28180447708 is 80774408182.

28180447708 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 503222253 + ... + 503222308.

Almost surely, 2^28180447708 is an apocalyptic number.

28180447708 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28180447708 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28180447708 is a wasteful number, since it uses less digits than its factorization.

28180447708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006444572 (or 1006444570 counting only the distinct ones).

The product of its (nonzero) digits is 802816, while the sum is 49.

The spelling of 28180447708 in words is "twenty-eight billion, one hundred eighty million, four hundred forty-seven thousand, seven hundred eight".