51307428 has 48 divisors (see below), whose sum is σ = 129729600. Its totient is φ = 15719424.

The previous prime is 51307427. The next prime is 51307433. The reversal of 51307428 is 82470315.

51307428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 51307395 and 51307404.

It is not an unprimeable number, because it can be changed into a prime (51307423) 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 15 ways as a sum of consecutive naturals, for example, 5848 + ... + 11696.

It is an arithmetic number, because the mean of its divisors is an integer number (2702700).

Almost surely, 2^51307428 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 51307428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64864800).

51307428 is an abundant number, since it is smaller than the sum of its proper divisors (78422172).

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

51307428 is a wasteful number, since it uses less digits than its factorization.

51307428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5916 (or 5914 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 51307428 is about 7162.9203541572. The cubic root of 51307428 is about 371.5866318266.

The spelling of 51307428 in words is "fifty-one million, three hundred seven thousand, four hundred twenty-eight".