26439240 has 32 divisors (see below), whose sum is σ = 79318080. Its totient is φ = 7050432.

The previous prime is 26439229. The next prime is 26439247. The reversal of 26439240 is 4293462.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 26439198 and 26439207.

It is not an unprimeable number, because it can be changed into a prime (26439247) 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, 110044 + ... + 110283.

It is an arithmetic number, because the mean of its divisors is an integer number (2478690).

Almost surely, 2^26439240 is an apocalyptic number.

26439240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26439240 is an abundant number, since it is smaller than the sum of its proper divisors (52878840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26439240 is a wasteful number, since it uses less digits than its factorization.

26439240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220341 (or 220337 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The square root of 26439240 is about 5141.9101509070. The cubic root of 26439240 is about 297.9085646538.

The spelling of 26439240 in words is "twenty-six million, four hundred thirty-nine thousand, two hundred forty".