51770728 has 16 divisors (see below), whose sum is σ = 97264260. Its totient is φ = 25833600.

The previous prime is 51770707. The next prime is 51770731. The reversal of 51770728 is 82707715.

It can be written as a sum of positive squares in 2 ways, for example, as 49871844 + 1898884 = 7062^2 + 1378^2 .

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, 2043 + ... + 10378.

Almost surely, 2^51770728 is an apocalyptic number.

It is an amenable number.

51770728 is a deficient number, since it is larger than the sum of its proper divisors (45493532).

51770728 is a wasteful number, since it uses less digits than its factorization.

51770728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12948 (or 12944 counting only the distinct ones).

The product of its (nonzero) digits is 27440, while the sum is 37.

The square root of 51770728 is about 7195.1878363251. The cubic root of 51770728 is about 372.7017431868.

The spelling of 51770728 in words is "fifty-one million, seven hundred seventy thousand, seven hundred twenty-eight".