26979858 has 64 divisors (see below), whose sum is σ = 63037440. Its totient is φ = 8542800.

The previous prime is 26979857. The next prime is 26979859. The reversal of 26979858 is 85897962.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (26979857) and next prime (26979859).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (26979853) 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 31 ways as a sum of consecutive naturals, for example, 118741 + ... + 118967.

It is an arithmetic number, because the mean of its divisors is an integer number (984960).

Almost surely, 2^26979858 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26979858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31518720).

26979858 is an abundant number, since it is smaller than the sum of its proper divisors (36057582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26979858 is a wasteful number, since it uses less digits than its factorization.

26979858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340 (or 334 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 54.

The square root of 26979858 is about 5194.2138962503. The cubic root of 26979858 is about 299.9253814418.

The spelling of 26979858 in words is "twenty-six million, nine hundred seventy-nine thousand, eight hundred fifty-eight".