26390990 has 16 divisors (see below), whose sum is σ = 48788352. Its totient is φ = 10270944.

The previous prime is 26390989. The next prime is 26390999. The reversal of 26390990 is 9909362.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26390999) 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 7 ways as a sum of consecutive naturals, for example, 35294 + ... + 36033.

It is an arithmetic number, because the mean of its divisors is an integer number (3049272).

Almost surely, 2^26390990 is an apocalyptic number.

26390990 is a deficient number, since it is larger than the sum of its proper divisors (22397362).

26390990 is a wasteful number, since it uses less digits than its factorization.

26390990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71371.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 26390990 is about 5137.2161722084. The cubic root of 26390990 is about 297.7272326505.

The spelling of 26390990 in words is "twenty-six million, three hundred ninety thousand, nine hundred ninety".