28479651784148 has 24 divisors (see below), whose sum is σ = 49885088999592. Its totient is φ = 14226775041024.

The previous prime is 28479651784147. The next prime is 28479651784183. The reversal of 28479651784148 is 84148715697482.

It can be written as a sum of positive squares in 4 ways, for example, as 5519952893764 + 22959698890384 = 2349458^2 + 4791628^2 .

It is a super-2 number, since 2×28479651784148² (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 (28479651784147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18880286 + ... + 20332842.

It is an arithmetic number, because the mean of its divisors is an integer number (2078545374983).

Almost surely, 2^{28479651784148} is an apocalyptic number.

It is an amenable number.

28479651784148 is a deficient number, since it is larger than the sum of its proper divisors (21405437215444).

28479651784148 is a wasteful number, since it uses less digits than its factorization.

28479651784148 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457051 (or 1457049 counting only the distinct ones).

The product of its digits is 867041280, while the sum is 74.

The spelling of 28479651784148 in words is "twenty-eight trillion, four hundred seventy-nine billion, six hundred fifty-one million, seven hundred eighty-four thousand, one hundred forty-eight".