55628945 has 16 divisors (see below), whose sum is σ = 68824080. Its totient is φ = 43133184.

The previous prime is 55628899. The next prime is 55628957. The reversal of 55628945 is 54982655.

It can be written as a sum of positive squares in 8 ways, for example, as 3341584 + 52287361 = 1828^2 + 7231^2 .

It is a cyclic number.

It is not a de Polignac number, because 55628945 - 2¹⁰ = 55627921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55628896 and 55628905.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71579 + ... + 72351.

It is an arithmetic number, because the mean of its divisors is an integer number (4301505).

Almost surely, 2^55628945 is an apocalyptic number.

It is an amenable number.

55628945 is a deficient number, since it is larger than the sum of its proper divisors (13195135).

55628945 is a wasteful number, since it uses less digits than its factorization.

55628945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1204.

The product of its digits is 432000, while the sum is 44.

The square root of 55628945 is about 7458.4814138000. The cubic root of 55628945 is about 381.7393601380.

The spelling of 55628945 in words is "fifty-five million, six hundred twenty-eight thousand, nine hundred forty-five".