26261990 has 32 divisors (see below), whose sum is σ = 50526720. Its totient is φ = 9798624.

The previous prime is 26261987. The next prime is 26261999. The reversal of 26261990 is 9916262.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 26261990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26261999) 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 15 ways as a sum of consecutive naturals, for example, 11699 + ... + 13761.

It is an arithmetic number, because the mean of its divisors is an integer number (1578960).

Almost surely, 2^26261990 is an apocalyptic number.

26261990 is a deficient number, since it is larger than the sum of its proper divisors (24264730).

26261990 is a wasteful number, since it uses less digits than its factorization.

26261990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2156.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 26261990 is about 5124.6453535830. The cubic root of 26261990 is about 297.2413400357.

The spelling of 26261990 in words is "twenty-six million, two hundred sixty-one thousand, nine hundred ninety".