28014019609 has 8 divisors (see below), whose sum is σ = 28176030792. Its totient is φ = 27852088320.

The previous prime is 28014019567. The next prime is 28014019639. The reversal of 28014019609 is 90691041082.

It can be written as a sum of positive squares in 4 ways, for example, as 5202448384 + 22811571225 = 72128^2 + 151035^2 .

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 28014019609 - 2¹⁷ = 28013888537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28014019639) 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, 773817 + ... + 809209.

It is an arithmetic number, because the mean of its divisors is an integer number (3522003849).

Almost surely, 2^28014019609 is an apocalyptic number.

It is an amenable number.

28014019609 is a deficient number, since it is larger than the sum of its proper divisors (162011183).

28014019609 is a wasteful number, since it uses less digits than its factorization.

28014019609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39947.

The product of its (nonzero) digits is 31104, while the sum is 40.

The spelling of 28014019609 in words is "twenty-eight billion, fourteen million, nineteen thousand, six hundred nine".