55830728 has 8 divisors (see below), whose sum is σ = 104682630. Its totient is φ = 27915360.

The previous prime is 55830673. The next prime is 55830757. The reversal of 55830728 is 82703855.

55830728 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., 37185604 + 18645124 = 6098^2 + 4318^2 .

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 = 55830691 and 55830700.

It is an unprimeable number.

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, 3489413 + ... + 3489428.

Almost surely, 2^55830728 is an apocalyptic number.

It is an amenable number.

55830728 is a deficient number, since it is larger than the sum of its proper divisors (48851902).

55830728 is a wasteful number, since it uses less digits than its factorization.

55830728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6978847 (or 6978843 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 55830728 is about 7471.9962526757. The cubic root of 55830728 is about 382.2003645384.

The spelling of 55830728 in words is "fifty-five million, eight hundred thirty thousand, seven hundred twenty-eight".