50728613 has 16 divisors (see below), whose sum is σ = 58497600. Its totient is φ = 43609968.

The previous prime is 50728609. The next prime is 50728619. The reversal of 50728613 is 31682705.

It is a happy number.

It is not a de Polignac number, because 50728613 - 2² = 50728609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 50728613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (50728619) 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 15 ways as a sum of consecutive naturals, for example, 859778 + ... + 859836.

It is an arithmetic number, because the mean of its divisors is an integer number (3656100).

Almost surely, 2^50728613 is an apocalyptic number.

It is an amenable number.

50728613 is a deficient number, since it is larger than the sum of its proper divisors (7768987).

50728613 is an frugal number, since it uses more digits than its factorization.

50728613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 50728613 is about 7122.4021930806. The cubic root of 50728613 is about 370.1840160873.

The spelling of 50728613 in words is "fifty million, seven hundred twenty-eight thousand, six hundred thirteen".