51704928 has 144 divisors (see below), whose sum is σ = 169041600. Its totient is φ = 14826240.

The previous prime is 51704927. The next prime is 51704929. The reversal of 51704928 is 82940715.

It is an interprime number because it is at equal distance from previous prime (51704927) and next prime (51704929).

It is a tau number, because it is divible by the number of its divisors (144).

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

It is a junction number, because it is equal to n+sod(n) for n = 51704892 and 51704901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51704921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59763 + ... + 60621.

It is an arithmetic number, because the mean of its divisors is an integer number (1173900).

Almost surely, 2^51704928 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 51704928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84520800).

51704928 is an abundant number, since it is smaller than the sum of its proper divisors (117336672).

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

51704928 is a wasteful number, since it uses less digits than its factorization.

51704928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905 (or 894 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 51704928 is about 7190.6138819992. The cubic root of 51704928 is about 372.5437763665.

The spelling of 51704928 in words is "fifty-one million, seven hundred four thousand, nine hundred twenty-eight".