28653296826 has 256 divisors, whose sum is σ = 77411635200. Its totient is φ = 6904085760.

The previous prime is 28653296821. The next prime is 28653296827. The reversal of 28653296826 is 62869235682.

It is a super-2 number, since 2×28653296826² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is not an unprimeable number, because it can be changed into a prime (28653296821) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 56293060 + ... + 56293568.

It is an arithmetic number, because the mean of its divisors is an integer number (302389200).

Almost surely, 2^28653296826 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28653296826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38705817600).

28653296826 is an abundant number, since it is smaller than the sum of its proper divisors (48758338374).

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

28653296826 is a wasteful number, since it uses less digits than its factorization.

28653296826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626 (or 604 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 57.

The spelling of 28653296826 in words is "twenty-eight billion, six hundred fifty-three million, two hundred ninety-six thousand, eight hundred twenty-six".