28677057531 has 4 divisors (see below), whose sum is σ = 38236076712. Its totient is φ = 19118038352.

The previous prime is 28677057463. The next prime is 28677057559. The reversal of 28677057531 is 13575077682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28677057531 - 2¹⁸ = 28676795387 is a prime.

It is a super-2 number, since 2×28677057531² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28677055531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4779509586 + ... + 4779509591.

It is an arithmetic number, because the mean of its divisors is an integer number (9559019178).

Almost surely, 2^28677057531 is an apocalyptic number.

28677057531 is a deficient number, since it is larger than the sum of its proper divisors (9559019181).

28677057531 is an equidigital number, since it uses as much as digits as its factorization.

28677057531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9559019180.

The product of its (nonzero) digits is 2469600, while the sum is 51.

The spelling of 28677057531 in words is "twenty-eight billion, six hundred seventy-seven million, fifty-seven thousand, five hundred thirty-one".