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28386379 = 717263907
BaseRepresentation
bin110110001001…
…0010001001011
31222102011210101
41230102101023
524231331004
62452230231
7463165060
oct154222113
958364711
1028386379
111502911a
12960b377
135b5b698
143aacc67
15275aba4
hex1b1244b

28386379 has 16 divisors (see below), whose sum is σ = 34518528. Its totient is φ = 22787712.

The previous prime is 28386367. The next prime is 28386401. The reversal of 28386379 is 97368382.

It is a cyclic number.

It is not a de Polignac number, because 28386379 - 27 = 28386251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28380379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30844 + ... + 31750.

It is an arithmetic number, because the mean of its divisors is an integer number (2157408).

Almost surely, 228386379 is an apocalyptic number.

28386379 is a deficient number, since it is larger than the sum of its proper divisors (6132149).

28386379 is a wasteful number, since it uses less digits than its factorization.

28386379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1194.

The product of its digits is 435456, while the sum is 46.

The square root of 28386379 is about 5327.8869169681. The cubic root of 28386379 is about 305.0492762810.

The spelling of 28386379 in words is "twenty-eight million, three hundred eighty-six thousand, three hundred seventy-nine".

Divisors: 1 7 17 119 263 907 1841 4471 6349 15419 31297 107933 238541 1669787 4055197 28386379