51578748 has 96 divisors (see below), whose sum is σ = 152550720. Its totient is φ = 14929920.

The previous prime is 51578741. The next prime is 51578767. The reversal of 51578748 is 84787515.

It is a happy number.

51578748 is a `hidden beast` number, since 5 + 1 + 578 + 74 + 8 = 666.

51578748 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51578741) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 22788 + ... + 24948.

It is an arithmetic number, because the mean of its divisors is an integer number (1589070).

Almost surely, 2^51578748 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 51578748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76275360).

51578748 is an abundant number, since it is smaller than the sum of its proper divisors (100971972).

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

51578748 is a wasteful number, since it uses less digits than its factorization.

51578748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204 (or 2196 counting only the distinct ones).

The product of its digits is 313600, while the sum is 45.

The square root of 51578748 is about 7181.8345845612. The cubic root of 51578748 is about 372.2404792642.

It can be divided in two parts, 51578 and 748, that added together give a triangular number (52326 = T₃₂₃).

The spelling of 51578748 in words is "fifty-one million, five hundred seventy-eight thousand, seven hundred forty-eight".