28296668660 has 96 divisors (see below), whose sum is σ = 65510387712. Its totient is φ = 10201489920.

The previous prime is 28296668651. The next prime is 28296668671. The reversal of 28296668660 is 6686669282.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28296668660.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5630909 + ... + 5635931.

It is an arithmetic number, because the mean of its divisors is an integer number (682399872).

Almost surely, 2^28296668660 is an apocalyptic number.

28296668660 is a gapful number since it is divisible by the number (20) 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 28296668660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32755193856).

28296668660 is an abundant number, since it is smaller than the sum of its proper divisors (37213719052).

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

28296668660 is a wasteful number, since it uses less digits than its factorization.

28296668660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5553 (or 5551 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 59.

The spelling of 28296668660 in words is "twenty-eight billion, two hundred ninety-six million, six hundred sixty-eight thousand, six hundred sixty".