26400300280 has 64 divisors (see below), whose sum is σ = 63112932000. Its totient is φ = 9938862592.

The previous prime is 26400300271. The next prime is 26400300287. The reversal of 26400300280 is 8200300462.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26400300287) 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 15 ways as a sum of consecutive naturals, for example, 129351 + ... + 263689.

Almost surely, 2^26400300280 is an apocalyptic number.

26400300280 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 26400300280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31556466000).

26400300280 is an abundant number, since it is smaller than the sum of its proper divisors (36712631720).

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

26400300280 is a wasteful number, since it uses less digits than its factorization.

26400300280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134401 (or 134363 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 25.

The spelling of 26400300280 in words is "twenty-six billion, four hundred million, three hundred thousand, two hundred eighty".