51778880 has 112 divisors (see below), whose sum is σ = 130356864. Its totient is φ = 19568640.

The previous prime is 51778879. The next prime is 51778901. The reversal of 51778880 is 8887715.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 729245 + ... + 729315.

Almost surely, 2^51778880 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51778880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65178432).

51778880 is an abundant number, since it is smaller than the sum of its proper divisors (78577984).

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

51778880 is a wasteful number, since it uses less digits than its factorization.

51778880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 125440, while the sum is 44.

The square root of 51778880 is about 7195.7543037544. The cubic root of 51778880 is about 372.7213044670.

It can be divided in two parts, 517 and 78880, that added together give a palindrome (79397).

The spelling of 51778880 in words is "fifty-one million, seven hundred seventy-eight thousand, eight hundred eighty".