26399855 has 8 divisors (see below), whose sum is σ = 31823232. Its totient is φ = 21024288.

The previous prime is 26399843. The next prime is 26399881. The reversal of 26399855 is 55899362.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26399855 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10724 + ... + 12953.

It is an arithmetic number, because the mean of its divisors is an integer number (3977904).

Almost surely, 2^26399855 is an apocalyptic number.

26399855 is a deficient number, since it is larger than the sum of its proper divisors (5423377).

26399855 is a wasteful number, since it uses less digits than its factorization.

26399855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23905.

The product of its digits is 583200, while the sum is 47.

The square root of 26399855 is about 5138.0789211533. The cubic root of 26399855 is about 297.7605654463.

The spelling of 26399855 in words is "twenty-six million, three hundred ninety-nine thousand, eight hundred fifty-five".