28698627747 has 18 divisors (see below), whose sum is σ = 39115101004. Its totient is φ = 18716347520.

The previous prime is 28698627739. The next prime is 28698627761. The reversal of 28698627747 is 74772689682.

It is not a de Polignac number, because 28698627747 - 2³ = 28698627739 is a prime.

It is a super-2 number, since 2×28698627747² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28698627547) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 13789747 + ... + 13791827.

Almost surely, 2^28698627747 is an apocalyptic number.

28698627747 is a deficient number, since it is larger than the sum of its proper divisors (10416473257).

28698627747 is an frugal number, since it uses more digits than its factorization.

28698627747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4259 (or 2131 counting only the distinct ones).

The product of its digits is 113799168, while the sum is 66.

The spelling of 28698627747 in words is "twenty-eight billion, six hundred ninety-eight million, six hundred twenty-seven thousand, seven hundred forty-seven".