26404020 has 54 divisors (see below), whose sum is σ = 80301858. Its totient is φ = 7022688.

The previous prime is 26404019. The next prime is 26404039. The reversal of 26404020 is 2040462.

26404020 is a `hidden beast` number, since 2 + 640 + 4 + 0 + 20 = 666.

It can be written as a sum of positive squares in only one way, i.e., 21123216 + 5280804 = 4596^2 + 2298^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 26403984 and 26404002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 68749 + ... + 69131.

Almost surely, 2^26404020 is an apocalyptic number.

26404020 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 26404020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40150929).

26404020 is an abundant number, since it is smaller than the sum of its proper divisors (53897838).

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

26404020 is a wasteful number, since it uses less digits than its factorization.

26404020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 26404020 is about 5138.4842122945. The cubic root of 26404020 is about 297.7762234558.

Adding to 26404020 its reverse (2040462), we get a palindrome (28444482).

The spelling of 26404020 in words is "twenty-six million, four hundred four thousand, twenty".