55728437 has 2 divisors, whose sum is σ = 55728438. Its totient is φ = 55728436.

The previous prime is 55728433. The next prime is 55728451. The reversal of 55728437 is 73482755.

55728437 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44209201 + 11519236 = 6649^2 + 3394^2 .

It is a cyclic number.

It is not a de Polignac number, because 55728437 - 2² = 55728433 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55728394 and 55728403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another 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 as a sum of consecutive naturals, namely, 27864218 + 27864219.

It is an arithmetic number, because the mean of its divisors is an integer number (27864219).

Almost surely, 2^55728437 is an apocalyptic number.

It is an amenable number.

55728437 is a deficient number, since it is larger than the sum of its proper divisors (1).

55728437 is an equidigital number, since it uses as much as digits as its factorization.

55728437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 235200, while the sum is 41.

The square root of 55728437 is about 7465.1481566008. The cubic root of 55728437 is about 381.9668040377.

It can be divided in two parts, 55728 and 437, that added together give a palindrome (56165).

The spelling of 55728437 in words is "fifty-five million, seven hundred twenty-eight thousand, four hundred thirty-seven".