26840004 has 12 divisors (see below), whose sum is σ = 62626704. Its totient is φ = 8946664.

The previous prime is 26839973. The next prime is 26840071. The reversal of 26840004 is 40004862.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1118322 + ... + 1118345.

It is an arithmetic number, because the mean of its divisors is an integer number (5218892).

Almost surely, 2^26840004 is an apocalyptic number.

It is an amenable number.

26840004 is an abundant number, since it is smaller than the sum of its proper divisors (35786700).

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

26840004 is a wasteful number, since it uses less digits than its factorization.

26840004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2236674 (or 2236672 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 26840004 is about 5180.7339248412. The cubic root of 26840004 is about 299.4062478588.

Adding to 26840004 its reverse (40004862), we get a palindrome (66844866).

The spelling of 26840004 in words is "twenty-six million, eight hundred forty thousand, four".