26509216 has 24 divisors (see below), whose sum is σ = 53875584. Its totient is φ = 12826560.

The previous prime is 26509211. The next prime is 26509253. The reversal of 26509216 is 61290562.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (26509211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12370 + ... + 14353.

It is an arithmetic number, because the mean of its divisors is an integer number (2244816).

Almost surely, 2^26509216 is an apocalyptic number.

It is an amenable number.

26509216 is an abundant number, since it is smaller than the sum of its proper divisors (27366368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26509216 is a wasteful number, since it uses less digits than its factorization.

26509216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26764 (or 26756 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 26509216 is about 5148.7101297315. The cubic root of 26509216 is about 298.1711552259.

Adding to 26509216 its reverse (61290562), we get a palindrome (87799778).

The spelling of 26509216 in words is "twenty-six million, five hundred nine thousand, two hundred sixteen".