26400009 has 8 divisors (see below), whose sum is σ = 35232480. Its totient is φ = 17583776.

The previous prime is 26399959. The next prime is 26400013. The reversal of 26400009 is 90000462.

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 26400009 - 2⁷ = 26399881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26400019) 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, 454 + ... + 7280.

It is an arithmetic number, because the mean of its divisors is an integer number (4404060).

Almost surely, 2^26400009 is an apocalyptic number.

It is an amenable number.

26400009 is a deficient number, since it is larger than the sum of its proper divisors (8832471).

26400009 is a wasteful number, since it uses less digits than its factorization.

26400009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8119.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 26400009 is about 5138.0939072773. The cubic root of 26400009 is about 297.7611444273.

The spelling of 26400009 in words is "twenty-six million, four hundred thousand, nine".