55623444 has 12 divisors (see below), whose sum is σ = 129788064. Its totient is φ = 18541144.

The previous prime is 55623443. The next prime is 55623457. The reversal of 55623444 is 44432655.

55623444 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×55623444² = 6187935044842272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55623443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2317632 + ... + 2317655.

It is an arithmetic number, because the mean of its divisors is an integer number (10815672).

Almost surely, 2^55623444 is an apocalyptic number.

It is an amenable number.

55623444 is an abundant number, since it is smaller than the sum of its proper divisors (74164620).

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

55623444 is a wasteful number, since it uses less digits than its factorization.

55623444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4635294 (or 4635292 counting only the distinct ones).

The product of its digits is 57600, while the sum is 33.

The square root of 55623444 is about 7458.1126298816. The cubic root of 55623444 is about 381.7267766562.

The spelling of 55623444 in words is "fifty-five million, six hundred twenty-three thousand, four hundred forty-four".