51438684 has 24 divisors (see below), whose sum is σ = 130935168. Its totient is φ = 15587440.

The previous prime is 51438671. The next prime is 51438689. The reversal of 51438684 is 48683415.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51438689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 194712 + ... + 194975.

It is an arithmetic number, because the mean of its divisors is an integer number (5455632).

Almost surely, 2^51438684 is an apocalyptic number.

It is an amenable number.

51438684 is an abundant number, since it is smaller than the sum of its proper divisors (79496484).

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

51438684 is a wasteful number, since it uses less digits than its factorization.

51438684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389705 (or 389703 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The square root of 51438684 is about 7172.0766867066. The cubic root of 51438684 is about 371.9032295403.

The spelling of 51438684 in words is "fifty-one million, four hundred thirty-eight thousand, six hundred eighty-four".