55830389 has 4 divisors (see below), whose sum is σ = 56095200. Its totient is φ = 55565580.

The previous prime is 55830371. The next prime is 55830403. The reversal of 55830389 is 98303855.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55830389 - 2¹² = 55826293 is a prime.

It is a super-3 number, since 3×55830389³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55830289) 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 3 ways as a sum of consecutive naturals, for example, 132089 + ... + 132510.

It is an arithmetic number, because the mean of its divisors is an integer number (14023800).

Almost surely, 2^55830389 is an apocalyptic number.

It is an amenable number.

55830389 is a deficient number, since it is larger than the sum of its proper divisors (264811).

55830389 is a wasteful number, since it uses less digits than its factorization.

55830389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264810.

The product of its (nonzero) digits is 129600, while the sum is 41.

The square root of 55830389 is about 7471.9735679404. The cubic root of 55830389 is about 382.1995909728.

The spelling of 55830389 in words is "fifty-five million, eight hundred thirty thousand, three hundred eighty-nine".