55490728 has 16 divisors (see below), whose sum is σ = 104266080. Its totient is φ = 27686448.

The previous prime is 55490723. The next prime is 55490741. The reversal of 55490728 is 82709455.

55490728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (55490723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3226 + ... + 11017.

It is an arithmetic number, because the mean of its divisors is an integer number (6516630).

Almost surely, 2^55490728 is an apocalyptic number.

It is an amenable number.

55490728 is a deficient number, since it is larger than the sum of its proper divisors (48775352).

55490728 is a wasteful number, since it uses less digits than its factorization.

55490728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14736 (or 14732 counting only the distinct ones).

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 55490728 is about 7449.2098909884. The cubic root of 55490728 is about 381.4229383652.

The spelling of 55490728 in words is "fifty-five million, four hundred ninety thousand, seven hundred twenty-eight".