26388820 has 24 divisors (see below), whose sum is σ = 57826944. Its totient is φ = 10096416.

The previous prime is 26388809. The next prime is 26388823. The reversal of 26388820 is 2888362.

It is a self number, because there is not a number n which added to its sum of digits gives 26388820.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26388823) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 28224 + ... + 29143.

It is an arithmetic number, because the mean of its divisors is an integer number (2409456).

Almost surely, 2^26388820 is an apocalyptic number.

26388820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26388820 is an abundant number, since it is smaller than the sum of its proper divisors (31438124).

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

26388820 is a wasteful number, since it uses less digits than its factorization.

26388820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57399 (or 57397 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 37.

The square root of 26388820 is about 5137.0049639844. The cubic root of 26388820 is about 297.7190722164.

The spelling of 26388820 in words is "twenty-six million, three hundred eighty-eight thousand, eight hundred twenty".