51440828 has 24 divisors (see below), whose sum is σ = 94993920. Its totient is φ = 24306480.

The previous prime is 51440801. The next prime is 51440911. The reversal of 51440828 is 82804415.

It is a happy number.

51440828 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 51440794 and 51440803.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 51413 + ... + 52403.

It is an arithmetic number, because the mean of its divisors is an integer number (3958080).

Almost surely, 2^51440828 is an apocalyptic number.

It is an amenable number.

51440828 is a deficient number, since it is larger than the sum of its proper divisors (43553092).

51440828 is a wasteful number, since it uses less digits than its factorization.

51440828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1697 (or 1695 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 32.

The square root of 51440828 is about 7172.2261537127. The cubic root of 51440828 is about 371.9083965299.

The spelling of 51440828 in words is "fifty-one million, four hundred forty thousand, eight hundred twenty-eight".