28084435140 has 24 divisors (see below), whose sum is σ = 78636418560. Its totient is φ = 7489182688.

The previous prime is 28084435121. The next prime is 28084435147. The reversal of 28084435140 is 4153448082.

It is not an unprimeable number, because it can be changed into a prime (28084435147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234036900 + ... + 234037019.

It is an arithmetic number, because the mean of its divisors is an integer number (3276517440).

Almost surely, 2^28084435140 is an apocalyptic number.

28084435140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28084435140 is an abundant number, since it is smaller than the sum of its proper divisors (50551983420).

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

28084435140 is a wasteful number, since it uses less digits than its factorization.

28084435140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468073931 (or 468073929 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 39.

The spelling of 28084435140 in words is "twenty-eight billion, eighty-four million, four hundred thirty-five thousand, one hundred forty".