28557477475582 has 48 divisors (see below), whose sum is σ = 47523501416160. Its totient is φ = 12859661580480.

The previous prime is 28557477475561. The next prime is 28557477475589.

It is a happy number.

28557477475582 is nontrivially palindromic in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 28557477475499 and 28557477475508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28557477475589) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 184489503 + ... + 184644229.

It is an arithmetic number, because the mean of its divisors is an integer number (990072946170).

Almost surely, 2^{28557477475582} is an apocalyptic number.

28557477475582 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

28557477475582 is a deficient number, since it is larger than the sum of its proper divisors (18966023940578).

28557477475582 is a wasteful number, since it uses less digits than its factorization.

28557477475582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161857 (or 161846 counting only the distinct ones).

The product of its digits is 6146560000, while the sum is 76.

The spelling of 28557477475582 in words is "twenty-eight trillion, five hundred fifty-seven billion, four hundred seventy-seven million, four hundred seventy-five thousand, five hundred eighty-two".