55428489 has 8 divisors (see below), whose sum is σ = 82116320. Its totient is φ = 36952308.

The previous prime is 55428487. The next prime is 55428521. The reversal of 55428489 is 98482455.

55428489 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55428489 - 2¹ = 55428487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55428481) 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 7 ways as a sum of consecutive naturals, for example, 1026427 + ... + 1026480.

It is an arithmetic number, because the mean of its divisors is an integer number (10264540).

Almost surely, 2^55428489 is an apocalyptic number.

It is an amenable number.

55428489 is a deficient number, since it is larger than the sum of its proper divisors (26687831).

55428489 is a wasteful number, since it uses less digits than its factorization.

55428489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2052916 (or 2052910 counting only the distinct ones).

The product of its digits is 460800, while the sum is 45.

The square root of 55428489 is about 7445.0311617884. The cubic root of 55428489 is about 381.2802823210.

The spelling of 55428489 in words is "fifty-five million, four hundred twenty-eight thousand, four hundred eighty-nine".