26513890 has 16 divisors (see below), whose sum is σ = 51396408. Its totient is φ = 9789696.

The previous prime is 26513887. The next prime is 26513909. The reversal of 26513890 is 9831562.

It can be written as a sum of positive squares in 4 ways, for example, as 22629049 + 3884841 = 4757^2 + 1971^2 .

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 7 ways as a sum of consecutive naturals, for example, 101847 + ... + 102106.

Almost surely, 2^26513890 is an apocalyptic number.

26513890 is a deficient number, since it is larger than the sum of its proper divisors (24882518).

26513890 is a wasteful number, since it uses less digits than its factorization.

26513890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203973.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 26513890 is about 5149.1640098175. The cubic root of 26513890 is about 298.1886783153.

The spelling of 26513890 in words is "twenty-six million, five hundred thirteen thousand, eight hundred ninety".