26400303840 has 48 divisors (see below), whose sum is σ = 83160958608. Its totient is φ = 7040080896.

The previous prime is 26400303829. The next prime is 26400303841. The reversal of 26400303840 is 4830300462.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 26400303798 and 26400303807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26400303841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27499837 + ... + 27500796.

It is an arithmetic number, because the mean of its divisors is an integer number (1732519971).

Almost surely, 2^26400303840 is an apocalyptic number.

26400303840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26400303840 is an abundant number, since it is smaller than the sum of its proper divisors (56760654768).

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

26400303840 is a wasteful number, since it uses less digits than its factorization.

26400303840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55000651 (or 55000643 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The spelling of 26400303840 in words is "twenty-six billion, four hundred million, three hundred three thousand, eight hundred forty".