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28076666831 = 591316535563
BaseRepresentation
bin11010001001011111…
…111110111111001111
32200110201012110021022
4122021133332333033
5430000111314311
620522004224355
72012523505343
oct321137767717
980421173238
1028076666831
11109a8601394
12553699b0bb
132855a81c35
141504c29623
15ae4d5c5db
hex6897fefcf

28076666831 has 16 divisors (see below), whose sum is σ = 28819739520. Its totient is φ = 27343236960.

The previous prime is 28076666819. The next prime is 28076666837. The reversal of 28076666831 is 13866667082.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-28076666831 is a prime.

It is a super-2 number, since 2×280766668312 (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28076666837) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5044256 + ... + 5049818.

It is an arithmetic number, because the mean of its divisors is an integer number (1801233720).

Almost surely, 228076666831 is an apocalyptic number.

28076666831 is a deficient number, since it is larger than the sum of its proper divisors (743072689).

28076666831 is a wasteful number, since it uses less digits than its factorization.

28076666831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6406.

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 28076666831 in words is "twenty-eight billion, seventy-six million, six hundred sixty-six thousand, eight hundred thirty-one".

Divisors: 1 59 131 653 5563 7729 38527 85543 328217 728753 3632639 5047037 42996427 214325701 475875709 28076666831