28925340660 has 144 divisors (see below), whose sum is σ = 92697696000. Its totient is φ = 7288925952.

The previous prime is 28925340643. The next prime is 28925340667. The reversal of 28925340660 is 6604352982.

28925340660 is a `hidden beast` number, since 28 + 92 + 534 + 0 + 6 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28925340667) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 186391 + ... + 304289.

It is an arithmetic number, because the mean of its divisors is an integer number (643734000).

Almost surely, 2^28925340660 is an apocalyptic number.

28925340660 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 28925340660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46348848000).

28925340660 is an abundant number, since it is smaller than the sum of its proper divisors (63772355340).

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

28925340660 is a wasteful number, since it uses less digits than its factorization.

28925340660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117990 (or 117985 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 45.

The spelling of 28925340660 in words is "twenty-eight billion, nine hundred twenty-five million, three hundred forty thousand, six hundred sixty".