50782809 has 16 divisors (see below), whose sum is σ = 84418560. Its totient is φ = 26380560.

The previous prime is 50782793. The next prime is 50782817. The reversal of 50782809 is 90828705.

It is not a de Polignac number, because 50782809 - 2⁴ = 50782793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (50782829) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109689 + ... + 110150.

It is an arithmetic number, because the mean of its divisors is an integer number (5276160).

Almost surely, 2^50782809 is an apocalyptic number.

It is an amenable number.

50782809 is a deficient number, since it is larger than the sum of its proper divisors (33635751).

50782809 is a wasteful number, since it uses less digits than its factorization.

50782809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219860.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 50782809 is about 7126.2057927062. The cubic root of 50782809 is about 370.3157980763.

It can be divided in two parts, 5078 and 2809, that added together give a palindrome (7887).

The spelling of 50782809 in words is "fifty million, seven hundred eighty-two thousand, eight hundred nine".