26056978 has 4 divisors (see below), whose sum is σ = 39085470. Its totient is φ = 13028488.

The previous prime is 26056951. The next prime is 26056997. The reversal of 26056978 is 87965062.

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

It can be written as a sum of positive squares in only one way, i.e., 15578809 + 10478169 = 3947^2 + 3237^2 .

It is a super-2 number, since 2×26056978² = 1357932204984968, which contains 22 as substring.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 6514243 + ... + 6514246.

Almost surely, 2^26056978 is an apocalyptic number.

26056978 is a deficient number, since it is larger than the sum of its proper divisors (13028492).

26056978 is a wasteful number, since it uses less digits than its factorization.

26056978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13028491.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 26056978 is about 5104.6036085087. The cubic root of 26056978 is about 296.4658554904.

The spelling of 26056978 in words is "twenty-six million, fifty-six thousand, nine hundred seventy-eight".