28718761620 has 48 divisors (see below), whose sum is σ = 80442649728. Its totient is φ = 7655468160.

The previous prime is 28718761613. The next prime is 28718761633. The reversal of 28718761620 is 2616781782.

It is a self number, because there is not a number n which added to its sum of digits gives 28718761620.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74382 + ... + 250938.

It is an arithmetic number, because the mean of its divisors is an integer number (1675888536).

Almost surely, 2^28718761620 is an apocalyptic number.

28718761620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28718761620 is an abundant number, since it is smaller than the sum of its proper divisors (51723888108).

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

28718761620 is a wasteful number, since it uses less digits than its factorization.

28718761620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179280 (or 179278 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 48.

The spelling of 28718761620 in words is "twenty-eight billion, seven hundred eighteen million, seven hundred sixty-one thousand, six hundred twenty".