28710908240 has 40 divisors (see below), whose sum is σ = 76288986240. Its totient is φ = 9843739776.

The previous prime is 28710908221. The next prime is 28710908293. The reversal of 28710908240 is 4280901782.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25634180 + ... + 25635299.

It is an arithmetic number, because the mean of its divisors is an integer number (1907224656).

Almost surely, 2^28710908240 is an apocalyptic number.

28710908240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28710908240 is an abundant number, since it is smaller than the sum of its proper divisors (47578078000).

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

28710908240 is a wasteful number, since it uses less digits than its factorization.

28710908240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51269499 (or 51269493 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 41.

The spelling of 28710908240 in words is "twenty-eight billion, seven hundred ten million, nine hundred eight thousand, two hundred forty".