55779444 has 108 divisors (see below), whose sum is σ = 166149984. Its totient is φ = 15730848.

The previous prime is 55779419. The next prime is 55779457. The reversal of 55779444 is 44497755.

55779444 is a `hidden beast` number, since 557 + 7 + 94 + 4 + 4 = 666.

It is a super-2 number, since 2×55779444² = 6222692745898272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55779444.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 181539 + ... + 181845.

Almost surely, 2^55779444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55779444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83074992).

55779444 is an abundant number, since it is smaller than the sum of its proper divisors (110370540).

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

55779444 is a wasteful number, since it uses less digits than its factorization.

55779444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434 (or 422 counting only the distinct ones).

The product of its digits is 705600, while the sum is 45.

The square root of 55779444 is about 7468.5637173422. The cubic root of 55779444 is about 382.0833037443.

The spelling of 55779444 in words is "fifty-five million, seven hundred seventy-nine thousand, four hundred forty-four".