26428780 has 48 divisors (see below), whose sum is σ = 63737856. Its totient is φ = 9017280.

The previous prime is 26428747. The next prime is 26428793. The reversal of 26428780 is 8782462.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43237 + ... + 43843.

It is an arithmetic number, because the mean of its divisors is an integer number (1327872).

Almost surely, 2^26428780 is an apocalyptic number.

26428780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 26428780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31868928).

26428780 is an abundant number, since it is smaller than the sum of its proper divisors (37309076).

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

26428780 is a wasteful number, since it uses less digits than its factorization.

26428780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934 (or 932 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 26428780 is about 5140.8929185502. The cubic root of 26428780 is about 297.8692728711.

The spelling of 26428780 in words is "twenty-six million, four hundred twenty-eight thousand, seven hundred eighty".