55807744 has 36 divisors (see below), whose sum is σ = 111941704. Its totient is φ = 27767808.

The previous prime is 55807711. The next prime is 55807747. The reversal of 55807744 is 44770855.

It is a super-2 number, since 2×55807744² = 6229008580739072, which contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 55807697 and 55807706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55807747) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 70519 + ... + 71305.

Almost surely, 2^55807744 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 55807744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55970852).

55807744 is an abundant number, since it is smaller than the sum of its proper divisors (56133960).

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

55807744 is an equidigital number, since it uses as much as digits as its factorization.

55807744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1080 (or 1066 counting only the distinct ones).

The product of its (nonzero) digits is 156800, while the sum is 40.

The square root of 55807744 is about 7470.4580850173. The cubic root of 55807744 is about 382.1479101570.

The spelling of 55807744 in words is "fifty-five million, eight hundred seven thousand, seven hundred forty-four".