26798778 has 48 divisors (see below), whose sum is σ = 61701120. Its totient is φ = 8382528.

The previous prime is 26798777. The next prime is 26798819. The reversal of 26798778 is 87789762.

Its product of digits (2370816) is a multiple of the sum of its prime divisors (768).

It is not an unprimeable number, because it can be changed into a prime (26798771) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43126 + ... + 43742.

It is an arithmetic number, because the mean of its divisors is an integer number (1285440).

Almost surely, 2^26798778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26798778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30850560).

26798778 is an abundant number, since it is smaller than the sum of its proper divisors (34902342).

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

26798778 is a wasteful number, since it uses less digits than its factorization.

26798778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 771 (or 768 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The square root of 26798778 is about 5176.7536159257. The cubic root of 26798778 is about 299.2528742215.

The spelling of 26798778 in words is "twenty-six million, seven hundred ninety-eight thousand, seven hundred seventy-eight".