26778427 has 4 divisors (see below), whose sum is σ = 28838320. Its totient is φ = 24718536.

The previous prime is 26778419. The next prime is 26778449. The reversal of 26778427 is 72487762.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26778427 - 2³ = 26778419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26778127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1029927 + ... + 1029952.

It is an arithmetic number, because the mean of its divisors is an integer number (7209580).

Almost surely, 2^26778427 is an apocalyptic number.

26778427 is a deficient number, since it is larger than the sum of its proper divisors (2059893).

26778427 is a wasteful number, since it uses less digits than its factorization.

26778427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2059892.

The product of its digits is 263424, while the sum is 43.

The square root of 26778427 is about 5174.7876284926. The cubic root of 26778427 is about 299.1771041310.

The spelling of 26778427 in words is "twenty-six million, seven hundred seventy-eight thousand, four hundred twenty-seven".