51728504 has 8 divisors (see below), whose sum is σ = 96990960. Its totient is φ = 25864248.

The previous prime is 51728503. The next prime is 51728513. The reversal of 51728504 is 40582715.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51728503) 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 as a sum of consecutive naturals, namely, 3233024 + ... + 3233039.

It is an arithmetic number, because the mean of its divisors is an integer number (12123870).

Almost surely, 2^51728504 is an apocalyptic number.

It is an amenable number.

51728504 is a deficient number, since it is larger than the sum of its proper divisors (45262456).

51728504 is a wasteful number, since it uses less digits than its factorization.

51728504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6466069 (or 6466065 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 51728504 is about 7192.2530545025. The cubic root of 51728504 is about 372.6003909408.

The spelling of 51728504 in words is "fifty-one million, seven hundred twenty-eight thousand, five hundred four".