26401809 has 8 divisors (see below), whose sum is σ = 40231360. Its totient is φ = 15086736.

The previous prime is 26401807. The next prime is 26401813. The reversal of 26401809 is 90810462.

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

It is not a de Polignac number, because 26401809 - 2¹ = 26401807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26401807) 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, 628594 + ... + 628635.

It is an arithmetic number, because the mean of its divisors is an integer number (5028920).

Almost surely, 2^26401809 is an apocalyptic number.

It is an amenable number.

26401809 is a deficient number, since it is larger than the sum of its proper divisors (13829551).

26401809 is a wasteful number, since it uses less digits than its factorization.

26401809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1257239.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 26401809 is about 5138.2690665243. The cubic root of 26401809 is about 297.7679115699.

The spelling of 26401809 in words is "twenty-six million, four hundred one thousand, eight hundred nine".