55447730 has 32 divisors (see below), whose sum is σ = 108864000. Its totient is φ = 20210112.

The previous prime is 55447729. The next prime is 55447751. The reversal of 55447730 is 3774455.

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 15 ways as a sum of consecutive naturals, for example, 7571 + ... + 12969.

It is an arithmetic number, because the mean of its divisors is an integer number (3402000).

Almost surely, 2^55447730 is an apocalyptic number.

55447730 is a deficient number, since it is larger than the sum of its proper divisors (53416270).

55447730 is a wasteful number, since it uses less digits than its factorization.

55447730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5498.

The product of its (nonzero) digits is 58800, while the sum is 35.

The square root of 55447730 is about 7446.3232537945. The cubic root of 55447730 is about 381.3243954075.

It can be divided in two parts, 554 and 47730, that added together give a palindrome (48284).

The spelling of 55447730 in words is "fifty-five million, four hundred forty-seven thousand, seven hundred thirty".