55444686 has 32 divisors (see below), whose sum is σ = 122342400. Its totient is φ = 16610880.

The previous prime is 55444663. The next prime is 55444691. The reversal of 55444686 is 68644455.

It is a super-2 number, since 2×55444686² = 6148226411277192, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1155 + ... + 10593.

It is an arithmetic number, because the mean of its divisors is an integer number (3823200).

Almost surely, 2^55444686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55444686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61171200).

55444686 is an abundant number, since it is smaller than the sum of its proper divisors (66897714).

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

55444686 is a wasteful number, since it uses less digits than its factorization.

55444686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9544.

The product of its digits is 460800, while the sum is 42.

The square root of 55444686 is about 7446.1188548129. The cubic root of 55444686 is about 381.3174172276.

The spelling of 55444686 in words is "fifty-five million, four hundred forty-four thousand, six hundred eighty-six".