26402876240 has 40 divisors (see below), whose sum is σ = 66108742728. Its totient is φ = 9748753920.

The previous prime is 26402876237. The next prime is 26402876249. The reversal of 26402876240 is 4267820462.

It can be written as a sum of positive squares in 4 ways, for example, as 5553826576 + 20849049664 = 74524^2 + 144392^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×26402876240² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26402876249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12692651 + ... + 12694730.

Almost surely, 2^26402876240 is an apocalyptic number.

26402876240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

26402876240 is an abundant number, since it is smaller than the sum of its proper divisors (39705866488).

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

26402876240 is a wasteful number, since it uses less digits than its factorization.

26402876240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25387407 (or 25387401 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 41.

The spelling of 26402876240 in words is "twenty-six billion, four hundred two million, eight hundred seventy-six thousand, two hundred forty".