26505978 has 8 divisors (see below), whose sum is σ = 53011968. Its totient is φ = 8835324.

The previous prime is 26505977. The next prime is 26506027. The reversal of 26505978 is 87950562.

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

26505978 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (26505977) 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, 2208826 + ... + 2208837.

It is an arithmetic number, because the mean of its divisors is an integer number (6626496).

Almost surely, 2^26505978 is an apocalyptic number.

26505978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

26505978 is a wasteful number, since it uses less digits than its factorization.

26505978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4417668.

The product of its (nonzero) digits is 151200, while the sum is 42.

The square root of 26505978 is about 5148.3956724401. The cubic root of 26505978 is about 298.1590145737.

The spelling of 26505978 in words is "twenty-six million, five hundred five thousand, nine hundred seventy-eight".