26420691 has 16 divisors (see below), whose sum is σ = 38815488. Its totient is φ = 15852000.

The previous prime is 26420677. The next prime is 26420729. The reversal of 26420691 is 19602462.

It is not a de Polignac number, because 26420691 - 2¹⁴ = 26404307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26420651) 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, 631 + ... + 7296.

It is an arithmetic number, because the mean of its divisors is an integer number (2425968).

Almost surely, 2^26420691 is an apocalyptic number.

26420691 is a deficient number, since it is larger than the sum of its proper divisors (12394797).

26420691 is a wasteful number, since it uses less digits than its factorization.

26420691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8042.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 26420691 is about 5140.1061273090. The cubic root of 26420691 is about 297.8388803671.

The spelling of 26420691 in words is "twenty-six million, four hundred twenty thousand, six hundred ninety-one".