28597654931 has 4 divisors (see below), whose sum is σ = 28647915000. Its totient is φ = 28547394864.

The previous prime is 28597654913. The next prime is 28597654933. The reversal of 28597654931 is 13945679582.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13945679582 = 2 ⋅6972839791.

It is a cyclic number.

It is not a de Polignac number, because 28597654931 - 2¹⁰ = 28597653907 is a prime.

It is a super-2 number, since 2×28597654931² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28597654933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25129181 + ... + 25130318.

It is an arithmetic number, because the mean of its divisors is an integer number (7161978750).

Almost surely, 2^28597654931 is an apocalyptic number.

28597654931 is a deficient number, since it is larger than the sum of its proper divisors (50260069).

28597654931 is an equidigital number, since it uses as much as digits as its factorization.

28597654931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50260068.

The product of its digits is 16329600, while the sum is 59.

The spelling of 28597654931 in words is "twenty-eight billion, five hundred ninety-seven million, six hundred fifty-four thousand, nine hundred thirty-one".