28545576447 has 8 divisors (see below), whose sum is σ = 38136438144. Its totient is φ = 18992549528.

The previous prime is 28545576431. The next prime is 28545576487. The reversal of 28545576447 is 74467554582.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28545576447 - 2⁴ = 28545576431 is a prime.

It is a super-2 number, since 2×28545576447² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28545576407) 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, 9456933 + ... + 9459950.

It is an arithmetic number, because the mean of its divisors is an integer number (4767054768).

Almost surely, 2^28545576447 is an apocalyptic number.

28545576447 is a deficient number, since it is larger than the sum of its proper divisors (9590861697).

28545576447 is a wasteful number, since it uses less digits than its factorization.

28545576447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18917389.

The product of its digits is 37632000, while the sum is 57.

The spelling of 28545576447 in words is "twenty-eight billion, five hundred forty-five million, five hundred seventy-six thousand, four hundred forty-seven".