51869828 has 12 divisors (see below), whose sum is σ = 92485260. Its totient is φ = 25445472.

The previous prime is 51869821. The next prime is 51869833. The reversal of 51869828 is 82896815.

It can be written as a sum of positive squares in 2 ways, for example, as 37185604 + 14684224 = 6098^2 + 3832^2 .

It is not an unprimeable number, because it can be changed into a prime (51869821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122123 + ... + 122546.

It is an arithmetic number, because the mean of its divisors is an integer number (7707105).

Almost surely, 2^51869828 is an apocalyptic number.

It is an amenable number.

51869828 is a deficient number, since it is larger than the sum of its proper divisors (40615432).

51869828 is a wasteful number, since it uses less digits than its factorization.

51869828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244726 (or 244724 counting only the distinct ones).

The product of its digits is 276480, while the sum is 47.

The square root of 51869828 is about 7202.0710910126. The cubic root of 51869828 is about 372.9394013015.

The spelling of 51869828 in words is "fifty-one million, eight hundred sixty-nine thousand, eight hundred twenty-eight".