55074728 has 8 divisors (see below), whose sum is σ = 103265130. Its totient is φ = 27537360.

The previous prime is 55074727. The next prime is 55074739. The reversal of 55074728 is 82747055.

55074728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 49589764 + 5484964 = 7042^2 + 2342^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 55074691 and 55074700.

It is not an unprimeable number, because it can be changed into a prime (55074727) 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 as a sum of consecutive naturals, namely, 3442163 + ... + 3442178.

Almost surely, 2^55074728 is an apocalyptic number.

It is an amenable number.

55074728 is a deficient number, since it is larger than the sum of its proper divisors (48190402).

55074728 is a wasteful number, since it uses less digits than its factorization.

55074728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6884347 (or 6884343 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 38.

The square root of 55074728 is about 7421.2349376637. The cubic root of 55074728 is about 380.4674026950.

The spelling of 55074728 in words is "fifty-five million, seventy-four thousand, seven hundred twenty-eight".