28528420272 has 80 divisors (see below), whose sum is σ = 81301760640. Its totient is φ = 8547827200.

The previous prime is 28528420267. The next prime is 28528420301. The reversal of 28528420272 is 27202482582.

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, 256554 + ... + 350537.

It is an arithmetic number, because the mean of its divisors is an integer number (1016272008).

Almost surely, 2^28528420272 is an apocalyptic number.

28528420272 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28528420272 is an abundant number, since it is smaller than the sum of its proper divisors (52773340368).

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

28528420272 is a wasteful number, since it uses less digits than its factorization.

28528420272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 607202 (or 607196 counting only the distinct ones).

The product of its (nonzero) digits is 286720, while the sum is 42.

The spelling of 28528420272 in words is "twenty-eight billion, five hundred twenty-eight million, four hundred twenty thousand, two hundred seventy-two".