26399004 has 12 divisors (see below), whose sum is σ = 61597704. Its totient is φ = 8799664.

The previous prime is 26398997. The next prime is 26399017. The reversal of 26399004 is 40099362.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1099947 + ... + 1099970.

It is an arithmetic number, because the mean of its divisors is an integer number (5133142).

Almost surely, 2^26399004 is an apocalyptic number.

It is an amenable number.

26399004 is an abundant number, since it is smaller than the sum of its proper divisors (35198700).

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

26399004 is a wasteful number, since it uses less digits than its factorization.

26399004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2199924 (or 2199922 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 26399004 is about 5137.9961074333. The cubic root of 26399004 is about 297.7573659721.

The spelling of 26399004 in words is "twenty-six million, three hundred ninety-nine thousand, four".