28690899093 has 12 divisors (see below), whose sum is σ = 41470411788. Its totient is φ = 19114342080.

The previous prime is 28690899091. The next prime is 28690899119. The reversal of 28690899093 is 39099809682.

It can be written as a sum of positive squares in 2 ways, for example, as 18869692689 + 9821206404 = 137367^2 + 99102^2 .

It is not a de Polignac number, because 28690899093 - 2¹ = 28690899091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28690899093.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28690899091) 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, 1062930 + ... + 1089587.

It is an arithmetic number, because the mean of its divisors is an integer number (3455867649).

Almost surely, 2^28690899093 is an apocalyptic number.

It is an amenable number.

28690899093 is a deficient number, since it is larger than the sum of its proper divisors (12779512695).

28690899093 is a wasteful number, since it uses less digits than its factorization.

28690899093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2154004 (or 2154001 counting only the distinct ones).

The product of its (nonzero) digits is 15116544, while the sum is 63.

The spelling of 28690899093 in words is "twenty-eight billion, six hundred ninety million, eight hundred ninety-nine thousand, ninety-three".