26678778 has 24 divisors (see below), whose sum is σ = 61056672. Its totient is φ = 7612944.

The previous prime is 26678761. The next prime is 26678779. The reversal of 26678778 is 87787662.

It is a self number, because there is not a number n which added to its sum of digits gives 26678778.

It is not an unprimeable number, because it can be changed into a prime (26678779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33076 + ... + 33872.

It is an arithmetic number, because the mean of its divisors is an integer number (2544028).

Almost surely, 2^26678778 is an apocalyptic number.

26678778 is an abundant number, since it is smaller than the sum of its proper divisors (34377894).

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

26678778 is an frugal number, since it uses more digits than its factorization.

26678778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606 (or 809 counting only the distinct ones).

The product of its digits is 1580544, while the sum is 51.

The square root of 26678778 is about 5165.1503366311. The cubic root of 26678778 is about 298.8055394137.

The spelling of 26678778 in words is "twenty-six million, six hundred seventy-eight thousand, seven hundred seventy-eight".