55830144 has 32 divisors (see below), whose sum is σ = 148299840. Its totient is φ = 18609920.

The previous prime is 55830121. The next prime is 55830149. The reversal of 55830144 is 44103855.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55830149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72312 + ... + 73079.

It is an arithmetic number, because the mean of its divisors is an integer number (4634370).

Almost surely, 2^55830144 is an apocalyptic number.

It is an amenable number.

55830144 is an abundant number, since it is smaller than the sum of its proper divisors (92469696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55830144 is a wasteful number, since it uses less digits than its factorization.

55830144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145408 (or 145396 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 55830144 is about 7471.9571733248. The cubic root of 55830144 is about 382.1990319043.

Adding to 55830144 its reverse (44103855), we get a palindrome (99933999).

The spelling of 55830144 in words is "fifty-five million, eight hundred thirty thousand, one hundred forty-four".