26820978 has 8 divisors (see below), whose sum is σ = 53641968. Its totient is φ = 8940324.

The previous prime is 26820977. The next prime is 26820979. The reversal of 26820978 is 87902862.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (26820977) and next prime (26820979).

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

26820978 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (26820977) by changing a digit.

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, 2235076 + ... + 2235087.

It is an arithmetic number, because the mean of its divisors is an integer number (6705246).

Almost surely, 2^26820978 is an apocalyptic number.

26820978 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.

26820978 is a wasteful number, since it uses less digits than its factorization.

26820978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4470168.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 26820978 is about 5178.8973729936. The cubic root of 26820978 is about 299.3354847071.

The spelling of 26820978 in words is "twenty-six million, eight hundred twenty thousand, nine hundred seventy-eight".