56505838 has 4 divisors (see below), whose sum is σ = 84758760. Its totient is φ = 28252918.

The previous prime is 56505817. The next prime is 56505853. The reversal of 56505838 is 83850565.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83850565 = 5 ⋅16770113.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 56505838.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14126458 + ... + 14126461.

It is an arithmetic number, because the mean of its divisors is an integer number (21189690).

Almost surely, 2^56505838 is an apocalyptic number.

56505838 is a deficient number, since it is larger than the sum of its proper divisors (28252922).

56505838 is a wasteful number, since it uses less digits than its factorization.

56505838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28252921.

The product of its (nonzero) digits is 144000, while the sum is 40.

The square root of 56505838 is about 7517.0365171389. The cubic root of 56505838 is about 383.7347298051.

The spelling of 56505838 in words is "fifty-six million, five hundred five thousand, eight hundred thirty-eight".