55819838 has 16 divisors (see below), whose sum is σ = 86795280. Its totient is φ = 26892096.

The previous prime is 55819837. The next prime is 55819843. The reversal of 55819838 is 83891855.

It is a junction number, because it is equal to n+sod(n) for n = 55819792 and 55819801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55819831) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 49145 + ... + 50267.

It is an arithmetic number, because the mean of its divisors is an integer number (5424705).

Almost surely, 2^55819838 is an apocalyptic number.

55819838 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

55819838 is a deficient number, since it is larger than the sum of its proper divisors (30975442).

55819838 is a wasteful number, since it uses less digits than its factorization.

55819838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011.

The product of its digits is 345600, while the sum is 47.

The square root of 55819838 is about 7471.2674962151. The cubic root of 55819838 is about 382.1755130348.

The spelling of 55819838 in words is "fifty-five million, eight hundred nineteen thousand, eight hundred thirty-eight".