51728448 has 28 divisors (see below), whose sum is σ = 136865360. Its totient is φ = 17242752.

The previous prime is 51728437. The next prime is 51728459. The reversal of 51728448 is 84482715.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51728437) and next prime (51728459).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134518 + ... + 134901.

Almost surely, 2^51728448 is an apocalyptic number.

It is an amenable number.

51728448 is an abundant number, since it is smaller than the sum of its proper divisors (85136912).

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

51728448 is a wasteful number, since it uses less digits than its factorization.

51728448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269434 (or 269424 counting only the distinct ones).

The product of its digits is 71680, while the sum is 39.

The square root of 51728448 is about 7192.2491614237. The cubic root of 51728448 is about 372.6002564848.

The spelling of 51728448 in words is "fifty-one million, seven hundred twenty-eight thousand, four hundred forty-eight".