28828881396 has 216 divisors, whose sum is σ = 89264185920. Its totient is φ = 7969311360.

The previous prime is 28828881383. The next prime is 28828881397. The reversal of 28828881396 is 69318882882.

It is a super-2 number, since 2×28828881396² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28828881397) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6536440 + ... + 6540848.

It is an arithmetic number, because the mean of its divisors is an integer number (413260120).

Almost surely, 2^28828881396 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28828881396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44632092960).

28828881396 is an abundant number, since it is smaller than the sum of its proper divisors (60435304524).

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

28828881396 is a wasteful number, since it uses less digits than its factorization.

28828881396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4497 (or 4452 counting only the distinct ones).

The product of its digits is 21233664, while the sum is 63.

The spelling of 28828881396 in words is "twenty-eight billion, eight hundred twenty-eight million, eight hundred eighty-one thousand, three hundred ninety-six".