28906530380 has 96 divisors (see below), whose sum is σ = 79107186816. Its totient is φ = 8610287616.

The previous prime is 28906530379. The next prime is 28906530391. The reversal of 28906530380 is 8303560982.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 436199 + ... + 498078.

It is an arithmetic number, because the mean of its divisors is an integer number (824033196).

Almost surely, 2^28906530380 is an apocalyptic number.

28906530380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28906530380 is an abundant number, since it is smaller than the sum of its proper divisors (50200656436).

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

28906530380 is a wasteful number, since it uses less digits than its factorization.

28906530380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934323 (or 934321 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 44.

The spelling of 28906530380 in words is "twenty-eight billion, nine hundred six million, five hundred thirty thousand, three hundred eighty".