26403985 has 8 divisors (see below), whose sum is σ = 31718376. Its totient is φ = 21100800.

The previous prime is 26403983. The next prime is 26403997. The reversal of 26403985 is 58930462.

It can be written as a sum of positive squares in 4 ways, for example, as 97344 + 26306641 = 312^2 + 5129^2 .

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

It is not a de Polignac number, because 26403985 - 2¹ = 26403983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26403983) 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, 3807 + ... + 8203.

It is an arithmetic number, because the mean of its divisors is an integer number (3964797).

Almost surely, 2^26403985 is an apocalyptic number.

It is an amenable number.

26403985 is a deficient number, since it is larger than the sum of its proper divisors (5314391).

26403985 is a wasteful number, since it uses less digits than its factorization.

26403985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5603.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 26403985 is about 5138.4808066198. The cubic root of 26403985 is about 297.7760918828.

The spelling of 26403985 in words is "twenty-six million, four hundred three thousand, nine hundred eighty-five".