28726752417 has 24 divisors (see below), whose sum is σ = 42121823520. Its totient is φ = 17401507200.

The previous prime is 28726752409. The next prime is 28726752419. The reversal of 28726752417 is 71425762782.

It is a happy number.

It is not a de Polignac number, because 28726752417 - 2³ = 28726752409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28726752417.

It is not an unprimeable number, because it can be changed into a prime (28726752419) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 754242 + ... + 791412.

It is an arithmetic number, because the mean of its divisors is an integer number (1755075980).

Almost surely, 2^28726752417 is an apocalyptic number.

It is an amenable number.

28726752417 is a deficient number, since it is larger than the sum of its proper divisors (13395071103).

28726752417 is a wasteful number, since it uses less digits than its factorization.

28726752417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39325 (or 39314 counting only the distinct ones).

The product of its digits is 2634240, while the sum is 51.

The spelling of 28726752417 in words is "twenty-eight billion, seven hundred twenty-six million, seven hundred fifty-two thousand, four hundred seventeen".