26390139 has 8 divisors (see below), whose sum is σ = 36138000. Its totient is φ = 17117856.

The previous prime is 26390113. The next prime is 26390153. The reversal of 26390139 is 93109362.

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

It is not a de Polignac number, because 26390139 - 2¹² = 26386043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26390179) 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, 118764 + ... + 118985.

It is an arithmetic number, because the mean of its divisors is an integer number (4517250).

Almost surely, 2^26390139 is an apocalyptic number.

26390139 is a deficient number, since it is larger than the sum of its proper divisors (9747861).

26390139 is a wasteful number, since it uses less digits than its factorization.

26390139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237789.

The product of its (nonzero) digits is 8748, while the sum is 33.

The square root of 26390139 is about 5137.1333445804. The cubic root of 26390139 is about 297.7240324598.

The spelling of 26390139 in words is "twenty-six million, three hundred ninety thousand, one hundred thirty-nine".