55028729 has 8 divisors (see below), whose sum is σ = 62939520. Its totient is φ = 47130336.

The previous prime is 55028713. The next prime is 55028749. The reversal of 55028729 is 92782055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55028729 - 2⁴ = 55028713 is a prime.

It is a super-2 number, since 2×55028729² = 6056322030710882, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 55028692 and 55028701.

It is not an unprimeable number, because it can be changed into a prime (55028749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10277 + ... + 14685.

It is an arithmetic number, because the mean of its divisors is an integer number (7867440).

Almost surely, 2^55028729 is an apocalyptic number.

It is an amenable number.

55028729 is a deficient number, since it is larger than the sum of its proper divisors (7910791).

55028729 is a wasteful number, since it uses less digits than its factorization.

55028729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6199.

The product of its (nonzero) digits is 50400, while the sum is 38.

The square root of 55028729 is about 7418.1351430127. The cubic root of 55028729 is about 380.3614497148.

The spelling of 55028729 in words is "fifty-five million, twenty-eight thousand, seven hundred twenty-nine".