28145503417 has 4 divisors (see below), whose sum is σ = 28146757860. Its totient is φ = 28144248976.

The previous prime is 28145503387. The next prime is 28145503459. The reversal of 28145503417 is 71430554182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11426754816 + 16718748601 = 106896^2 + 129301^2 .

It is a cyclic number.

It is not a de Polignac number, because 28145503417 - 2²⁷ = 28011285689 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28145503417.

It is not an unprimeable number, because it can be changed into a prime (28145503717) 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, 592942 + ... + 638647.

It is an arithmetic number, because the mean of its divisors is an integer number (7036689465).

Almost surely, 2^28145503417 is an apocalyptic number.

It is an amenable number.

28145503417 is a deficient number, since it is larger than the sum of its proper divisors (1254443).

28145503417 is a wasteful number, since it uses less digits than its factorization.

28145503417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254442.

The product of its (nonzero) digits is 134400, while the sum is 40.

The spelling of 28145503417 in words is "twenty-eight billion, one hundred forty-five million, five hundred three thousand, four hundred seventeen".