51562728 has 96 divisors (see below), whose sum is σ = 160617600. Its totient is φ = 14638464.

The previous prime is 51562697. The next prime is 51562733. The reversal of 51562728 is 82726515.

It is a happy number.

51562728 is a `hidden beast` number, since 5 + 1 + 5 + 627 + 28 = 666.

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 = 51562692 and 51562701.

It is an unprimeable number.

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, 132358 + ... + 132746.

It is an arithmetic number, because the mean of its divisors is an integer number (1673100).

Almost surely, 2^51562728 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 51562728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80308800).

51562728 is an abundant number, since it is smaller than the sum of its proper divisors (109054872).

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

51562728 is a wasteful number, since it uses less digits than its factorization.

51562728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 671 (or 664 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 51562728 is about 7180.7191840372. The cubic root of 51562728 is about 372.2019368399.

The spelling of 51562728 in words is "fifty-one million, five hundred sixty-two thousand, seven hundred twenty-eight".