26390690 has 8 divisors (see below), whose sum is σ = 47503260. Its totient is φ = 10556272.

The previous prime is 26390687. The next prime is 26390699. The reversal of 26390690 is 9609362.

It can be written as a sum of positive squares in 2 ways, for example, as 23261329 + 3129361 = 4823^2 + 1769^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×26390690² = 1392937037352200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26390690.

It is not an unprimeable number, because it can be changed into a prime (26390699) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1319525 + ... + 1319544.

Almost surely, 2^26390690 is an apocalyptic number.

26390690 is a deficient number, since it is larger than the sum of its proper divisors (21112570).

26390690 is a wasteful number, since it uses less digits than its factorization.

26390690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2639076.

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

The square root of 26390690 is about 5137.1869734321. The cubic root of 26390690 is about 297.7261045065.

The spelling of 26390690 in words is "twenty-six million, three hundred ninety thousand, six hundred ninety".