28972197622170 has 576 divisors, whose sum is σ = 90398126407680. Its totient is φ = 6408442656000.

The previous prime is 28972197622111. The next prime is 28972197622171. The reversal of 28972197622170 is 7122679127982.

28972197622170 is a `hidden beast` number, since 289 + 7 + 219 + 76 + 2 + 2 + 1 + 70 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 28972197622098 and 28972197622107.

It is not an unprimeable number, because it can be changed into a prime (28972197622171) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 1353387607 + ... + 1353409013.

It is an arithmetic number, because the mean of its divisors is an integer number (156941191680).

Almost surely, 2^{28972197622170} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28972197622170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45199063203840).

28972197622170 is an abundant number, since it is smaller than the sum of its proper divisors (61425928785510).

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

28972197622170 is a wasteful number, since it uses less digits than its factorization.

28972197622170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21703 (or 21689 counting only the distinct ones).

The product of its (nonzero) digits is 21337344, while the sum is 63.

The spelling of 28972197622170 in words is "twenty-eight trillion, nine hundred seventy-two billion, one hundred ninety-seven million, six hundred twenty-two thousand, one hundred seventy".