50728505 has 8 divisors (see below), whose sum is σ = 61028424. Its totient is φ = 40480000.

The previous prime is 50728471. The next prime is 50728523. The reversal of 50728505 is 50582705.

50728505 = T₂₈₉ + T₂₉₀ + ... + T₆₈₉.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 22934521 + 27793984 = 4789^2 + 5272^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 50728505 - 2⁶ = 50728441 is a prime.

It is a Duffinian number.

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 7 ways as a sum of consecutive naturals, for example, 10646 + ... + 14655.

It is an arithmetic number, because the mean of its divisors is an integer number (7628553).

Almost surely, 2^50728505 is an apocalyptic number.

It is an amenable number.

50728505 is a deficient number, since it is larger than the sum of its proper divisors (10299919).

50728505 is a wasteful number, since it uses less digits than its factorization.

50728505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25707.

The product of its (nonzero) digits is 14000, while the sum is 32.

The square root of 50728505 is about 7122.3946113649. The cubic root of 50728505 is about 370.1837533828.

The spelling of 50728505 in words is "fifty million, seven hundred twenty-eight thousand, five hundred five".