26890645 has 8 divisors (see below), whose sum is σ = 32711256. Its totient is φ = 21217536.

The previous prime is 26890639. The next prime is 26890649. The reversal of 26890645 is 54609862.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8305924 + 18584721 = 2882^2 + 4311^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 26890645 - 2³ = 26890637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26890598 and 26890607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26890649) 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, 36472 + ... + 37201.

It is an arithmetic number, because the mean of its divisors is an integer number (4088907).

Almost surely, 2^26890645 is an apocalyptic number.

It is an amenable number.

26890645 is a deficient number, since it is larger than the sum of its proper divisors (5820611).

26890645 is an equidigital number, since it uses as much as digits as its factorization.

26890645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73751.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 26890645 is about 5185.6190565833. The cubic root of 26890645 is about 299.5944334478.

The spelling of 26890645 in words is "twenty-six million, eight hundred ninety thousand, six hundred forty-five".