55728430 has 64 divisors (see below), whose sum is σ = 109771200. Its totient is φ = 20321280.

The previous prime is 55728427. The next prime is 55728433. The reversal of 55728430 is 3482755.

It is a happy number.

55728430 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (55728427) and next prime (55728433).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55728433) 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 31 ways as a sum of consecutive naturals, for example, 511216 + ... + 511324.

It is an arithmetic number, because the mean of its divisors is an integer number (1715175).

Almost surely, 2^55728430 is an apocalyptic number.

55728430 is a deficient number, since it is larger than the sum of its proper divisors (54042770).

55728430 is a wasteful number, since it uses less digits than its factorization.

55728430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 55728430 is about 7465.1476877554. The cubic root of 55728430 is about 381.9667880448.

The spelling of 55728430 in words is "fifty-five million, seven hundred twenty-eight thousand, four hundred thirty".