28717700670 has 192 divisors, whose sum is σ = 84051639360. Its totient is φ = 6759936000.

The previous prime is 28717700639. The next prime is 28717700681. The reversal of 28717700670 is 7600771782.

It is a happy number.

28717700670 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2931180 + ... + 2940960.

It is an arithmetic number, because the mean of its divisors is an integer number (437768955).

Almost surely, 2^28717700670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28717700670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42025819680).

28717700670 is an abundant number, since it is smaller than the sum of its proper divisors (55333938690).

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

28717700670 is a wasteful number, since it uses less digits than its factorization.

28717700670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9931 (or 9928 counting only the distinct ones).

The product of its (nonzero) digits is 230496, while the sum is 45.

The spelling of 28717700670 in words is "twenty-eight billion, seven hundred seventeen million, seven hundred thousand, six hundred seventy".