51728146 has 16 divisors (see below), whose sum is σ = 83885760. Its totient is φ = 23839920.

The previous prime is 51728137. The next prime is 51728147. The reversal of 51728146 is 64182715.

It is not an unprimeable number, because it can be changed into a prime (51728147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16990 + ... + 19801.

It is an arithmetic number, because the mean of its divisors is an integer number (5242860).

Almost surely, 2^51728146 is an apocalyptic number.

51728146 is a deficient number, since it is larger than the sum of its proper divisors (32157614).

51728146 is a wasteful number, since it uses less digits than its factorization.

51728146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36849.

The product of its digits is 13440, while the sum is 34.

The square root of 51728146 is about 7192.2281665698. The cubic root of 51728146 is about 372.5995313809.

The spelling of 51728146 in words is "fifty-one million, seven hundred twenty-eight thousand, one hundred forty-six".