26390137 has 8 divisors (see below), whose sum is σ = 27995976. Its totient is φ = 24790272.

The previous prime is 26390113. The next prime is 26390153. The reversal of 26390137 is 73109362.

It can be written as a sum of positive squares in 4 ways, for example, as 13220496 + 13169641 = 3636^2 + 3629^2 .

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 26390137 - 2⁷ = 26390009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26390099 and 26390108.

It is not an unprimeable number, because it can be changed into a prime (26390167) 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, 10363 + ... + 12655.

It is an arithmetic number, because the mean of its divisors is an integer number (3499497).

Almost surely, 2^26390137 is an apocalyptic number.

It is an amenable number.

26390137 is a deficient number, since it is larger than the sum of its proper divisors (1605839).

26390137 is a wasteful number, since it uses less digits than its factorization.

26390137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2987.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 26390137 is about 5137.1331499193. The cubic root of 26390137 is about 297.7240249387.

Adding to 26390137 its reverse (73109362), we get a palindrome (99499499).

The spelling of 26390137 in words is "twenty-six million, three hundred ninety thousand, one hundred thirty-seven".