127820292440 has 32 divisors (see below), whose sum is σ = 296872940160. Its totient is φ = 49478822400.

The previous prime is 127820292403. The next prime is 127820292449. The reversal of 127820292440 is 44292028721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (127820292449) 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, 51539201 + ... + 51541680.

It is an arithmetic number, because the mean of its divisors is an integer number (9277279380).

Almost surely, 2^127820292440 is an apocalyptic number.

127820292440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

127820292440 is an abundant number, since it is smaller than the sum of its proper divisors (169052647720).

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

127820292440 is a wasteful number, since it uses less digits than its factorization.

127820292440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103080923 (or 103080919 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The spelling of 127820292440 in words is "one hundred twenty-seven billion, eight hundred twenty million, two hundred ninety-two thousand, four hundred forty".