26690990 has 16 divisors (see below), whose sum is σ = 48703248. Its totient is φ = 10529856.

The previous prime is 26690981. The next prime is 26690999. The reversal of 26690990 is 9909662.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (26690981) and next prime (26690999).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26690999) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17552 + ... + 19011.

It is an arithmetic number, because the mean of its divisors is an integer number (3043953).

Almost surely, 2^26690990 is an apocalyptic number.

26690990 is a deficient number, since it is larger than the sum of its proper divisors (22012258).

26690990 is a wasteful number, since it uses less digits than its factorization.

26690990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36643.

The product of its (nonzero) digits is 52488, while the sum is 41.

The square root of 26690990 is about 5166.3323547755. The cubic root of 26690990 is about 298.8511244179.

The spelling of 26690990 in words is "twenty-six million, six hundred ninety thousand, nine hundred ninety".