51304788 has 72 divisors (see below), whose sum is σ = 137985120. Its totient is φ = 16027200.

The previous prime is 51304763. The next prime is 51304831. The reversal of 51304788 is 88740315.

51304788 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 72838 + ... + 73538.

It is an arithmetic number, because the mean of its divisors is an integer number (1916460).

Almost surely, 2^51304788 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 51304788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68992560).

51304788 is an abundant number, since it is smaller than the sum of its proper divisors (86680332).

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

51304788 is a wasteful number, since it uses less digits than its factorization.

51304788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837 (or 832 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 51304788 is about 7162.7360694081. The cubic root of 51304788 is about 371.5802584445.

The spelling of 51304788 in words is "fifty-one million, three hundred four thousand, seven hundred eighty-eight".