51805788 has 24 divisors (see below), whose sum is σ = 121093392. Its totient is φ = 17238144.

The previous prime is 51805781. The next prime is 51805811. The reversal of 51805788 is 88750815.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51805781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3906 + ... + 10902.

It is an arithmetic number, because the mean of its divisors is an integer number (5045558).

Almost surely, 2^51805788 is an apocalyptic number.

It is an amenable number.

51805788 is an abundant number, since it is smaller than the sum of its proper divisors (69287604).

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

51805788 is a wasteful number, since it uses less digits than its factorization.

51805788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7621 (or 7619 counting only the distinct ones).

The product of its (nonzero) digits is 89600, while the sum is 42.

The square root of 51805788 is about 7197.6237745523. The cubic root of 51805788 is about 372.7858574795.

The spelling of 51805788 in words is "fifty-one million, eight hundred five thousand, seven hundred eighty-eight".