26390025 has 36 divisors (see below), whose sum is σ = 48181068. Its totient is φ = 13802880.

The previous prime is 26390017. The next prime is 26390041. The reversal of 26390025 is 52009362.

26390025 is a `hidden beast` number, since 2 + 639 + 0 + 0 + 25 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 2653641 + 23736384 = 1629^2 + 4872^2 .

It is not a de Polignac number, because 26390025 - 2³ = 26390017 is a prime.

It is an unprimeable number.

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 35 ways as a sum of consecutive naturals, for example, 10819 + ... + 13031.

It is an arithmetic number, because the mean of its divisors is an integer number (1338363).

Almost surely, 2^26390025 is an apocalyptic number.

26390025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

26390025 is a deficient number, since it is larger than the sum of its proper divisors (21791043).

26390025 is a wasteful number, since it uses less digits than its factorization.

26390025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2282 (or 2274 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 26390025 is about 5137.1222488860. The cubic root of 26390025 is about 297.7236037569.

Adding to 26390025 its reverse (52009362), we get a palindrome (78399387).

The spelling of 26390025 in words is "twenty-six million, three hundred ninety thousand, twenty-five".