26401979 has 8 divisors (see below), whose sum is σ = 27213168. Its totient is φ = 25596000.

The previous prime is 26401943. The next prime is 26401981. The reversal of 26401979 is 97910462.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26401979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26401679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10604 + ... + 12854.

It is an arithmetic number, because the mean of its divisors is an integer number (3401646).

Almost surely, 2^26401979 is an apocalyptic number.

26401979 is a deficient number, since it is larger than the sum of its proper divisors (811189).

26401979 is a wasteful number, since it uses less digits than its factorization.

26401979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2605.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 26401979 is about 5138.2856090334. The cubic root of 26401979 is about 297.7685506730.

The spelling of 26401979 in words is "twenty-six million, four hundred one thousand, nine hundred seventy-nine".