28803879539440 has 80 divisors (see below), whose sum is σ = 67745362456800. Its totient is φ = 11388711453696.

The previous prime is 28803879539399. The next prime is 28803879539441. The reversal of 28803879539440 is 4493597830882.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 28803879539440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28803879539441) 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, 3109147 + ... + 8202106.

It is an arithmetic number, because the mean of its divisors is an integer number (846817030710).

Almost surely, 2^{28803879539440} is an apocalyptic number.

28803879539440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28803879539440 is an abundant number, since it is smaller than the sum of its proper divisors (38941482917360).

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

28803879539440 is a wasteful number, since it uses less digits than its factorization.

28803879539440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11311634 (or 11311628 counting only the distinct ones).

The product of its (nonzero) digits is 418037760, while the sum is 70.

The spelling of 28803879539440 in words is "twenty-eight trillion, eight hundred three billion, eight hundred seventy-nine million, five hundred thirty-nine thousand, four hundred forty".