26690390 has 16 divisors (see below), whose sum is σ = 48511008. Its totient is φ = 10572096.

The previous prime is 26690381. The next prime is 26690413. The reversal of 26690390 is 9309662.

It is a super-3 number, since 3×26690390³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26690390.

It is a congruent number.

It is an unprimeable number.

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, 11927 + ... + 13986.

It is an arithmetic number, because the mean of its divisors is an integer number (3031938).

Almost surely, 2^26690390 is an apocalyptic number.

26690390 is a deficient number, since it is larger than the sum of its proper divisors (21820618).

26690390 is a wasteful number, since it uses less digits than its factorization.

26690390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26023.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 26690390 is about 5166.2742861757. The cubic root of 26690390 is about 298.8488850602.

The spelling of 26690390 in words is "twenty-six million, six hundred ninety thousand, three hundred ninety".