51728754 has 128 divisors (see below), whose sum is σ = 139345920. Its totient is φ = 12398400.

The previous prime is 51728753. The next prime is 51728767. The reversal of 51728754 is 45782715.

Its product of digits (78400) is a multiple of the sum of its prime divisors (196).

It is not an unprimeable number, because it can be changed into a prime (51728753) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 623197 + ... + 623279.

It is an arithmetic number, because the mean of its divisors is an integer number (1088640).

Almost surely, 2^51728754 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51728754, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69672960).

51728754 is an abundant number, since it is smaller than the sum of its proper divisors (87617166).

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

51728754 is a wasteful number, since it uses less digits than its factorization.

51728754 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196.

The product of its digits is 78400, while the sum is 39.

The square root of 51728754 is about 7192.2704342926. The cubic root of 51728754 is about 372.6009911898.

The spelling of 51728754 in words is "fifty-one million, seven hundred twenty-eight thousand, seven hundred fifty-four".