26428020788 has 12 divisors (see below), whose sum is σ = 49806654660. Its totient is φ = 12197548032.

The previous prime is 26428020781. The next prime is 26428020799. The reversal of 26428020788 is 88702082462.

It can be written as a sum of positive squares in 2 ways, for example, as 7615703824 + 18812316964 = 87268^2 + 137158^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26428020781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254115533 + ... + 254115636.

It is an arithmetic number, because the mean of its divisors is an integer number (4150554555).

Almost surely, 2^26428020788 is an apocalyptic number.

It is an amenable number.

26428020788 is a deficient number, since it is larger than the sum of its proper divisors (23378633872).

26428020788 is a wasteful number, since it uses less digits than its factorization.

26428020788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508231186 (or 508231184 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 47.

The spelling of 26428020788 in words is "twenty-six billion, four hundred twenty-eight million, twenty thousand, seven hundred eighty-eight".