26890155 has 12 divisors (see below), whose sum is σ = 46609680. Its totient is φ = 14341392.

The previous prime is 26890153. The next prime is 26890169. The reversal of 26890155 is 55109862.

It is a happy number.

It is not a de Polignac number, because 26890155 - 2¹ = 26890153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26890153) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 298735 + ... + 298824.

It is an arithmetic number, because the mean of its divisors is an integer number (3884140).

Almost surely, 2^26890155 is an apocalyptic number.

26890155 is a deficient number, since it is larger than the sum of its proper divisors (19719525).

26890155 is a wasteful number, since it uses less digits than its factorization.

26890155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597570 (or 597567 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 26890155 is about 5185.5718103214. The cubic root of 26890155 is about 299.5926137051.

The spelling of 26890155 in words is "twenty-six million, eight hundred ninety thousand, one hundred fifty-five".