26490420 has 144 divisors (see below), whose sum is σ = 92933568. Its totient is φ = 6036480.

The previous prime is 26490419. The next prime is 26490433. The reversal of 26490420 is 2409462.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33267 + ... + 34053.

It is an arithmetic number, because the mean of its divisors is an integer number (645372).

Almost surely, 2^26490420 is an apocalyptic number.

26490420 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 26490420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46466784).

26490420 is an abundant number, since it is smaller than the sum of its proper divisors (66443148).

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

26490420 is a wasteful number, since it uses less digits than its factorization.

26490420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830 (or 825 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 26490420 is about 5146.8844945268. The cubic root of 26490420 is about 298.1006671595.

Adding to 26490420 its reverse (2409462), we get a palindrome (28899882).

The spelling of 26490420 in words is "twenty-six million, four hundred ninety thousand, four hundred twenty".