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26398889 = 1114991601
BaseRepresentation
bin110010010110…
…1000010101001
31211200012110122
41210231002221
523224231024
62341453025
7440246456
oct144550251
954605418
1026398889
11139a0970
128a11175
135613b5a
14371282d
1524b6d5e
hex192d0a9

26398889 has 8 divisors (see below), whose sum is σ = 28836000. Its totient is φ = 23968000.

The previous prime is 26398873. The next prime is 26398907. The reversal of 26398889 is 98889362.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 26398889 - 24 = 26398873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 26398889.

It is not an unprimeable number, because it can be changed into a prime (26398829) 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 7 ways as a sum of consecutive naturals, for example, 15689 + ... + 17289.

It is an arithmetic number, because the mean of its divisors is an integer number (3604500).

Almost surely, 226398889 is an apocalyptic number.

It is an amenable number.

26398889 is a deficient number, since it is larger than the sum of its proper divisors (2437111).

26398889 is a wasteful number, since it uses less digits than its factorization.

26398889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3111.

The product of its digits is 1492992, while the sum is 53.

The square root of 26398889 is about 5137.9849162877. The cubic root of 26398889 is about 297.7569336055.

The spelling of 26398889 in words is "twenty-six million, three hundred ninety-eight thousand, eight hundred eighty-nine".

Divisors: 1 11 1499 1601 16489 17611 2399899 26398889