51728832 has 84 divisors (see below), whose sum is σ = 153107136. Its totient is φ = 16680960.

The previous prime is 51728827. The next prime is 51728843. The reversal of 51728832 is 23882715.

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 polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16408 + ... + 19304.

It is an arithmetic number, because the mean of its divisors is an integer number (1822704).

Almost surely, 2^51728832 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 51728832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76553568).

51728832 is an abundant number, since it is smaller than the sum of its proper divisors (101378304).

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

51728832 is a wasteful number, since it uses less digits than its factorization.

51728832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2946 (or 2933 counting only the distinct ones).

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

The square root of 51728832 is about 7192.2758567786. The cubic root of 51728832 is about 372.6011784671.

The spelling of 51728832 in words is "fifty-one million, seven hundred twenty-eight thousand, eight hundred thirty-two".