51728470 has 32 divisors (see below), whose sum is σ = 96780096. Its totient is φ = 19891200.

The previous prime is 51728461. The next prime is 51728471. The reversal of 51728470 is 7482715.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51728471) 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 15 ways as a sum of consecutive naturals, for example, 28222 + ... + 29998.

It is an arithmetic number, because the mean of its divisors is an integer number (3024378).

Almost surely, 2^51728470 is an apocalyptic number.

51728470 is a deficient number, since it is larger than the sum of its proper divisors (45051626).

51728470 is a wasteful number, since it uses less digits than its factorization.

51728470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1896.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 51728470 is about 7192.2506908478. The cubic root of 51728470 is about 372.6003093068.

The spelling of 51728470 in words is "fifty-one million, seven hundred twenty-eight thousand, four hundred seventy".