28366306929 has 27 divisors (see below), whose sum is σ = 42361309497. Its totient is φ = 18290737800.

The previous prime is 28366306921. The next prime is 28366306933. The reversal of 28366306929 is 92960366382.

The square root of 28366306929 is 168423.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 28366306929 - 2³ = 28366306921 is a prime.

It is a super-2 number, since 2×28366306929² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28366306921) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 15662434 + ... + 15664244.

Almost surely, 2^28366306929 is an apocalyptic number.

28366306929 is the 168423-rd square number.

28366306929 is the 84212-nd centered octagonal number.

It is an amenable number.

28366306929 is a deficient number, since it is larger than the sum of its proper divisors (13995002568).

28366306929 is an frugal number, since it uses more digits than its factorization.

28366306929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3690 (or 1845 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 54.

The spelling of 28366306929 in words is "twenty-eight billion, three hundred sixty-six million, three hundred six thousand, nine hundred twenty-nine".