26978749 has 8 divisors (see below), whose sum is σ = 31415040. Its totient is φ = 22688016.

The previous prime is 26978681. The next prime is 26978761. The reversal of 26978749 is 94787962.

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

It is a cyclic number.

It is not a de Polignac number, because 26978749 - 2⁷ = 26978621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 26978696 and 26978705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26978449) 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, 35989 + ... + 36730.

It is an arithmetic number, because the mean of its divisors is an integer number (3926880).

Almost surely, 2^26978749 is an apocalyptic number.

It is an amenable number.

26978749 is a deficient number, since it is larger than the sum of its proper divisors (4436291).

26978749 is an equidigital number, since it uses as much as digits as its factorization.

26978749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72779.

The product of its digits is 1524096, while the sum is 52.

The square root of 26978749 is about 5194.1071417521. The cubic root of 26978749 is about 299.9212719340.

The spelling of 26978749 in words is "twenty-six million, nine hundred seventy-eight thousand, seven hundred forty-nine".