55443380 has 24 divisors (see below), whose sum is σ = 116648448. Its totient is φ = 22135968.

The previous prime is 55443361. The next prime is 55443433. The reversal of 55443380 is 8334455.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9857 + ... + 14423.

It is an arithmetic number, because the mean of its divisors is an integer number (4860352).

Almost surely, 2^55443380 is an apocalyptic number.

It is an amenable number.

55443380 is an abundant number, since it is smaller than the sum of its proper divisors (61205068).

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

55443380 is a wasteful number, since it uses less digits than its factorization.

55443380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5183 (or 5181 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 55443380 is about 7446.0311576034. The cubic root of 55443380 is about 381.3144232259.

It can be divided in two parts, 554 and 43380, that added together give a palindrome (43934).

The spelling of 55443380 in words is "fifty-five million, four hundred forty-three thousand, three hundred eighty".