55649128 has 32 divisors (see below), whose sum is σ = 108201600. Its totient is φ = 26826096.

The previous prime is 55649107. The next prime is 55649129. The reversal of 55649128 is 82194655.

It is not an unprimeable number, because it can be changed into a prime (55649129) 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 7 ways as a sum of consecutive naturals, for example, 830551 + ... + 830617.

It is an arithmetic number, because the mean of its divisors is an integer number (3381300).

Almost surely, 2^55649128 is an apocalyptic number.

It is an amenable number.

55649128 is a deficient number, since it is larger than the sum of its proper divisors (52552472).

55649128 is an frugal number, since it uses more digits than its factorization.

55649128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214 (or 116 counting only the distinct ones).

The product of its digits is 86400, while the sum is 40.

The square root of 55649128 is about 7459.8343145140. The cubic root of 55649128 is about 381.7855214419.

The spelling of 55649128 in words is "fifty-five million, six hundred forty-nine thousand, one hundred twenty-eight".