26978081 has 16 divisors (see below), whose sum is σ = 30777600. Its totient is φ = 23442048.

The previous prime is 26978059. The next prime is 26978087. The reversal of 26978081 is 18087962.

It is not a de Polignac number, because 26978081 - 2¹⁸ = 26715937 is a prime.

It is a super-2 number, since 2×26978081² = 1455633708885122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26978087) 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 15 ways as a sum of consecutive naturals, for example, 58805 + ... + 59261.

It is an arithmetic number, because the mean of its divisors is an integer number (1923600).

Almost surely, 2^26978081 is an apocalyptic number.

It is an amenable number.

26978081 is a deficient number, since it is larger than the sum of its proper divisors (3799519).

26978081 is a wasteful number, since it uses less digits than its factorization.

26978081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 26978081 is about 5194.0428377132. The cubic root of 26978081 is about 299.9187965405.

The spelling of 26978081 in words is "twenty-six million, nine hundred seventy-eight thousand, eighty-one".