26090778 has 64 divisors (see below), whose sum is σ = 63774720. Its totient is φ = 6955200.

The previous prime is 26090707. The next prime is 26090789. The reversal of 26090778 is 87709062.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37413 + ... + 38103.

It is an arithmetic number, because the mean of its divisors is an integer number (996480).

Almost surely, 2^26090778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26090778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31887360).

26090778 is an abundant number, since it is smaller than the sum of its proper divisors (37683942).

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

26090778 is a wasteful number, since it uses less digits than its factorization.

26090778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 26090778 is about 5107.9132725605. The cubic root of 26090778 is about 296.5939877230.

The spelling of 26090778 in words is "twenty-six million, ninety thousand, seven hundred seventy-eight".