51487828 has 18 divisors (see below), whose sum is σ = 104814906. Its totient is φ = 22066128.

The previous prime is 51487817. The next prime is 51487837. The reversal of 51487828 is 82878415.

It can be written as a sum of positive squares in only one way, i.e., 34082244 + 17405584 = 5838^2 + 4172^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 131151 + ... + 131542.

Almost surely, 2^51487828 is an apocalyptic number.

It is an amenable number.

51487828 is an abundant number, since it is smaller than the sum of its proper divisors (53327078).

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

51487828 is a wasteful number, since it uses less digits than its factorization.

51487828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262711 (or 262702 counting only the distinct ones).

The product of its digits is 143360, while the sum is 43.

The square root of 51487828 is about 7175.5019336629. The cubic root of 51487828 is about 372.0216293740.

The spelling of 51487828 in words is "fifty-one million, four hundred eighty-seven thousand, eight hundred twenty-eight".