26240139 has 8 divisors (see below), whose sum is σ = 38874320. Its totient is φ = 17493408.

The previous prime is 26240131. The next prime is 26240161. The reversal of 26240139 is 93104262.

26240139 is a `hidden beast` number, since 2 + 624 + 0 + 1 + 39 = 666.

It is not a de Polignac number, because 26240139 - 2³ = 26240131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 971857 = 26240139 / (2 + 6 + 2 + 4 + 0 + 1 + 3 + 9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26240131) 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, 485902 + ... + 485955.

It is an arithmetic number, because the mean of its divisors is an integer number (4859290).

Almost surely, 2^26240139 is an apocalyptic number.

26240139 is a deficient number, since it is larger than the sum of its proper divisors (12634181).

26240139 is an equidigital number, since it uses as much as digits as its factorization.

26240139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 971866 (or 971860 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 26240139 is about 5122.5129575239. The cubic root of 26240139 is about 297.1588783649.

It can be divided in two parts, 262 and 40139, that added together give a square (40401 = 201²).

The spelling of 26240139 in words is "twenty-six million, two hundred forty thousand, one hundred thirty-nine".