28966959857972 has 6 divisors (see below), whose sum is σ = 50692179751458. Its totient is φ = 14483479928984.

The previous prime is 28966959857959. The next prime is 28966959857977. The reversal of 28966959857972 is 27975895966982.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 23821076307856 + 5145883550116 = 4880684^2 + 2268454^2 .

It is a super-2 number, since 2×28966959857972² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28966959857977) 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 as a sum of consecutive naturals, namely, 3620869982243 + ... + 3620869982250.

It is an arithmetic number, because the mean of its divisors is an integer number (8448696625243).

Almost surely, 2^{28966959857972} is an apocalyptic number.

It is an amenable number.

28966959857972 is a deficient number, since it is larger than the sum of its proper divisors (21725219893486).

28966959857972 is a wasteful number, since it uses less digits than its factorization.

28966959857972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7241739964497 (or 7241739964495 counting only the distinct ones).

The product of its digits is 74071065600, while the sum is 92.

The spelling of 28966959857972 in words is "twenty-eight trillion, nine hundred sixty-six billion, nine hundred fifty-nine million, eight hundred fifty-seven thousand, nine hundred seventy-two".