51140728 has 32 divisors (see below), whose sum is σ = 98607600. Its totient is φ = 24855552.

The previous prime is 51140689. The next prime is 51140737. The reversal of 51140728 is 82704115.

It is a junction number, because it is equal to n+sod(n) for n = 51140696 and 51140705.

It is a congruent number.

It is an unprimeable number.

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, 45226 + ... + 46342.

Almost surely, 2^51140728 is an apocalyptic number.

It is an amenable number.

51140728 is a deficient number, since it is larger than the sum of its proper divisors (47466872).

51140728 is a wasteful number, since it uses less digits than its factorization.

51140728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279 (or 1275 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 28.

The square root of 51140728 is about 7151.2745717110. The cubic root of 51140728 is about 371.1837616447.

The spelling of 51140728 in words is "fifty-one million, one hundred forty thousand, seven hundred twenty-eight".