28812879744 has 64 divisors (see below), whose sum is σ = 83491879680. Its totient is φ = 8731174400.

The previous prime is 28812879721. The next prime is 28812879749. The reversal of 28812879744 is 44797821882.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28812879749) 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, 3406392 + ... + 3414839.

It is an arithmetic number, because the mean of its divisors is an integer number (1304560620).

Almost surely, 2^28812879744 is an apocalyptic number.

28812879744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

28812879744 is an abundant number, since it is smaller than the sum of its proper divisors (54678999936).

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

28812879744 is a wasteful number, since it uses less digits than its factorization.

28812879744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6821259 (or 6821247 counting only the distinct ones).

The product of its digits is 14450688, while the sum is 60.

The spelling of 28812879744 in words is "twenty-eight billion, eight hundred twelve million, eight hundred seventy-nine thousand, seven hundred forty-four".