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BaseRepresentation
bin11010111010100100…
…001001000010111010
32202121002010222211100
4122322210021002322
5433141324341221
621135411512230
72042110405560
oct327244110272
982532128740
1028899840186
111129022a748
1257265b8676
132957489769
1415822a7a30
15b42260926
hex6ba9090ba

28899840186 has 24 divisors (see below), whose sum is σ = 71561509344. Its totient is φ = 8257097160.

The previous prime is 28899840143. The next prime is 28899840247. The reversal of 28899840186 is 68104899882.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 114681780 + ... + 114682031.

It is an arithmetic number, because the mean of its divisors is an integer number (2981729556).

Almost surely, 228899840186 is an apocalyptic number.

28899840186 is an abundant number, since it is smaller than the sum of its proper divisors (42661669158).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28899840186 is a wasteful number, since it uses less digits than its factorization.

28899840186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229363826 (or 229363823 counting only the distinct ones).

The product of its (nonzero) digits is 15925248, while the sum is 63.

The spelling of 28899840186 in words is "twenty-eight billion, eight hundred ninety-nine million, eight hundred forty thousand, one hundred eighty-six".