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28914079 = 79366001
BaseRepresentation
bin110111001001…
…1000110011111
32000101222122211
41232103012133
524400222304
62511421251
7500523415
oct156230637
960358584
1028914079
1115359637
129824827
135cb492c
143ba92b5
152812204
hex1b9319f

28914079 has 4 divisors (see below), whose sum is σ = 29280160. Its totient is φ = 28548000.

The previous prime is 28914043. The next prime is 28914113. The reversal of 28914079 is 97041982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97041982 = 248520991.

It is a cyclic number.

It is not a de Polignac number, because 28914079 - 211 = 28912031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28974079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 182922 + ... + 183079.

It is an arithmetic number, because the mean of its divisors is an integer number (7320040).

Almost surely, 228914079 is an apocalyptic number.

28914079 is a deficient number, since it is larger than the sum of its proper divisors (366081).

28914079 is an equidigital number, since it uses as much as digits as its factorization.

28914079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366080.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 28914079 is about 5377.1813248207. The cubic root of 28914079 is about 306.9279611128.

The spelling of 28914079 in words is "twenty-eight million, nine hundred fourteen thousand, seventy-nine".

Divisors: 1 79 366001 28914079