51788140 has 12 divisors (see below), whose sum is σ = 108755136. Its totient is φ = 20715248.

The previous prime is 51788089. The next prime is 51788141. The reversal of 51788140 is 4188715.

51788140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×51788140² = 5364022889319200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51788096 and 51788105.

It is not an unprimeable number, because it can be changed into a prime (51788141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1294684 + ... + 1294723.

It is an arithmetic number, because the mean of its divisors is an integer number (9062928).

Almost surely, 2^51788140 is an apocalyptic number.

It is an amenable number.

51788140 is an abundant number, since it is smaller than the sum of its proper divisors (56966996).

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

51788140 is a wasteful number, since it uses less digits than its factorization.

51788140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2589416 (or 2589414 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 34.

The square root of 51788140 is about 7196.3977099657. The cubic root of 51788140 is about 372.7435219783.

The spelling of 51788140 in words is "fifty-one million, seven hundred eighty-eight thousand, one hundred forty".