28913168379648 has 432 divisors, whose sum is σ = 96852124970496. Its totient is φ = 7485843087360.

The previous prime is 28913168379569. The next prime is 28913168379661. The reversal of 28913168379648 is 84697386131982.

It is a self number, because there is not a number n which added to its sum of digits gives 28913168379648.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44313058 + ... + 44960798.

It is an arithmetic number, because the mean of its divisors is an integer number (224194733728).

Almost surely, 2^{28913168379648} is an apocalyptic number.

28913168379648 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28913168379648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48426062485248).

28913168379648 is an abundant number, since it is smaller than the sum of its proper divisors (67938956590848).

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

28913168379648 is a wasteful number, since it uses less digits than its factorization.

28913168379648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647828 (or 647795 counting only the distinct ones).

The product of its digits is 752467968, while the sum is 75.

The spelling of 28913168379648 in words is "twenty-eight trillion, nine hundred thirteen billion, one hundred sixty-eight million, three hundred seventy-nine thousand, six hundred forty-eight".