28909084512 has 96 divisors (see below), whose sum is σ = 94611573504. Its totient is φ = 7508851200.

The previous prime is 28909084489. The next prime is 28909084517. The reversal of 28909084512 is 21548090982.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28909084517) 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, 1948039 + ... + 1962822.

It is an arithmetic number, because the mean of its divisors is an integer number (985537224).

Almost surely, 2^28909084512 is an apocalyptic number.

28909084512 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28909084512 is an abundant number, since it is smaller than the sum of its proper divisors (65702488992).

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

28909084512 is a wasteful number, since it uses less digits than its factorization.

28909084512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3910892 (or 3910884 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 48.

The spelling of 28909084512 in words is "twenty-eight billion, nine hundred nine million, eighty-four thousand, five hundred twelve".