26420978 has 8 divisors (see below), whose sum is σ = 39897900. Its totient is φ = 13121680.

The previous prime is 26420971. The next prime is 26420983. The reversal of 26420978 is 87902462.

It can be written as a sum of positive squares in 2 ways, for example, as 18258529 + 8162449 = 4273^2 + 2857^2 .

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

It is not an unprimeable number, because it can be changed into a prime (26420971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44033 + ... + 44628.

Almost surely, 2^26420978 is an apocalyptic number.

26420978 is a deficient number, since it is larger than the sum of its proper divisors (13476922).

26420978 is a wasteful number, since it uses less digits than its factorization.

26420978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88812.

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 26420978 is about 5140.1340449447. The cubic root of 26420978 is about 297.8399588078.

The spelling of 26420978 in words is "twenty-six million, four hundred twenty thousand, nine hundred seventy-eight".