28496705920 has 32 divisors (see below), whose sum is σ = 68124939120. Its totient is φ = 11398682112.

The previous prime is 28496705891. The next prime is 28496705927. The reversal of 28496705920 is 2950769482.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28496705927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22262412 + ... + 22263691.

Almost surely, 2^28496705920 is an apocalyptic number.

28496705920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28496705920 is an abundant number, since it is smaller than the sum of its proper divisors (39628233200).

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

28496705920 is an equidigital number, since it uses as much as digits as its factorization.

28496705920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44526122 (or 44526110 counting only the distinct ones).

The product of its (nonzero) digits is 2177280, while the sum is 52.

The spelling of 28496705920 in words is "twenty-eight billion, four hundred ninety-six million, seven hundred five thousand, nine hundred twenty".