28965507074980 has 96 divisors (see below), whose sum is σ = 70501754695680. Its totient is φ = 9790404274560.

The previous prime is 28965507074963. The next prime is 28965507074981. The reversal of 28965507074980 is 8947070556982.

It is a super-2 number, since 2×28965507074980² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (70).

It is not an unprimeable number, because it can be changed into a prime (28965507074981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137653329 + ... + 137863591.

It is an arithmetic number, because the mean of its divisors is an integer number (734393278080).

Almost surely, 2^{28965507074980} is an apocalyptic number.

28965507074980 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 28965507074980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35250877347840).

28965507074980 is an abundant number, since it is smaller than the sum of its proper divisors (41536247620700).

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

28965507074980 is a wasteful number, since it uses less digits than its factorization.

28965507074980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224209 (or 224207 counting only the distinct ones).

The product of its (nonzero) digits is 304819200, while the sum is 70.

The spelling of 28965507074980 in words is "twenty-eight trillion, nine hundred sixty-five billion, five hundred seven million, seventy-four thousand, nine hundred eighty".