28619147647 has 4 divisors (see below), whose sum is σ = 28647179176. Its totient is φ = 28591116120.

The previous prime is 28619147587. The next prime is 28619147657. The reversal of 28619147647 is 74674191682.

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 28619147647 - 2²³ = 28610759039 is a prime.

It is a super-2 number, since 2×28619147647² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28619147657) 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, 14014233 + ... + 14016274.

It is an arithmetic number, because the mean of its divisors is an integer number (7161794794).

Almost surely, 2^28619147647 is an apocalyptic number.

28619147647 is a deficient number, since it is larger than the sum of its proper divisors (28031529).

28619147647 is a wasteful number, since it uses less digits than its factorization.

28619147647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28031528.

The product of its digits is 4064256, while the sum is 55.

The spelling of 28619147647 in words is "twenty-eight billion, six hundred nineteen million, one hundred forty-seven thousand, six hundred forty-seven".