28468574981 has 16 divisors (see below), whose sum is σ = 35892097920. Its totient is φ = 21934049280.

The previous prime is 28468574977. The next prime is 28468575017. The reversal of 28468574981 is 18947586482.

It is not a de Polignac number, because 28468574981 - 2² = 28468574977 is a prime.

It is a super-2 number, since 2×28468574981² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28468574581) 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 in 15 ways as a sum of consecutive naturals, for example, 2070236 + ... + 2083941.

It is an arithmetic number, because the mean of its divisors is an integer number (2243256120).

Almost surely, 2^28468574981 is an apocalyptic number.

It is an amenable number.

28468574981 is a deficient number, since it is larger than the sum of its proper divisors (7423522939).

28468574981 is a wasteful number, since it uses less digits than its factorization.

28468574981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4154284.

The product of its digits is 30965760, while the sum is 62.

The spelling of 28468574981 in words is "twenty-eight billion, four hundred sixty-eight million, five hundred seventy-four thousand, nine hundred eighty-one".