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26440081 = 124921169
BaseRepresentation
bin110010011011…
…1000110010001
31211202021222021
41210313012101
523232040311
62342411441
7440510533
oct144670621
954667867
1026440081
1113a19908
128a30b81
135629825
143723853
1524c4171
hex1937191

26440081 has 4 divisors (see below), whose sum is σ = 26462500. Its totient is φ = 26417664.

The previous prime is 26440061. The next prime is 26440093. The reversal of 26440081 is 18004462.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19891600 + 6548481 = 4460^2 + 2559^2 .

It is a cyclic number.

It is not a de Polignac number, because 26440081 - 217 = 26309009 is a prime.

It is a super-2 number, since 2×264400812 = 1398155766573122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26440061) 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, 9336 + ... + 11833.

It is an arithmetic number, because the mean of its divisors is an integer number (6615625).

Almost surely, 226440081 is an apocalyptic number.

It is an amenable number.

26440081 is a deficient number, since it is larger than the sum of its proper divisors (22419).

26440081 is a wasteful number, since it uses less digits than its factorization.

26440081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22418.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 26440081 is about 5141.9919292041. The cubic root of 26440081 is about 297.9117233231.

The spelling of 26440081 in words is "twenty-six million, four hundred forty thousand, eighty-one".

Divisors: 1 1249 21169 26440081