28287849601 has 12 divisors (see below), whose sum is σ = 32922273636. Its totient is φ = 24203505920.

The previous prime is 28287849589. The next prime is 28287849683. The reversal of 28287849601 is 10694878282.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9336197376 + 18951652225 = 96624^2 + 137665^2 .

It is not a de Polignac number, because 28287849601 - 2¹³ = 28287841409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28287849691) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6873940 + ... + 6878053.

It is an arithmetic number, because the mean of its divisors is an integer number (2743522803).

Almost surely, 2^28287849601 is an apocalyptic number.

It is an amenable number.

28287849601 is a deficient number, since it is larger than the sum of its proper divisors (4634424035).

28287849601 is a wasteful number, since it uses less digits than its factorization.

28287849601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13752032 (or 13752021 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 55.

The spelling of 28287849601 in words is "twenty-eight billion, two hundred eighty-seven million, eight hundred forty-nine thousand, six hundred one".