55555444 has 12 divisors (see below), whose sum is σ = 111110944. Its totient is φ = 23809464.

The previous prime is 55555429. The next prime is 55555459. The reversal of 55555444 is 44455555.

It is an interprime number because it is at equal distance from previous prime (55555429) and next prime (55555459).

55555444 is an admirable number.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 10 and base 14.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 992034 + ... + 992089.

Almost surely, 2^55555444 is an apocalyptic number.

It is an amenable number.

55555444 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

55555444 is a wasteful number, since it uses less digits than its factorization.

55555444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1984134 (or 1984132 counting only the distinct ones).

The product of its digits is 200000, while the sum is 37.

The square root of 55555444 is about 7453.5524416214. The cubic root of 55555444 is about 381.5711587858.

It can be divided in two parts, 5 and 5555444, that added together give a square (5555449 = 2357²).

The spelling of 55555444 in words is "fifty-five million, five hundred fifty-five thousand, four hundred forty-four".