28677950220 has 48 divisors (see below), whose sum is σ = 80428507488. Its totient is φ = 7635048960.

The previous prime is 28677950167. The next prime is 28677950221. The reversal of 28677950220 is 2205977682.

It is a self number, because there is not a number n which added to its sum of digits gives 28677950220.

It is not an unprimeable number, because it can be changed into a prime (28677950221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350311 + ... + 424350.

It is an arithmetic number, because the mean of its divisors is an integer number (1675593906).

Almost surely, 2^28677950220 is an apocalyptic number.

28677950220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28677950220 is an abundant number, since it is smaller than the sum of its proper divisors (51750557268).

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

28677950220 is a wasteful number, since it uses less digits than its factorization.

28677950220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 775290 (or 775288 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 28677950220 in words is "twenty-eight billion, six hundred seventy-seven million, nine hundred fifty thousand, two hundred twenty".