55328445 has 12 divisors (see below), whose sum is σ = 95902716. Its totient is φ = 29508480.

The previous prime is 55328443. The next prime is 55328467. The reversal of 55328445 is 54482355.

55328445 is a `hidden beast` number, since 5 + 532 + 84 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9603801 + 45724644 = 3099^2 + 6762^2 .

It is not a de Polignac number, because 55328445 - 2¹ = 55328443 is a prime.

It is a super-2 number, since 2×55328445² = 6122473652236050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55328443) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 614716 + ... + 614805.

It is an arithmetic number, because the mean of its divisors is an integer number (7991893).

Almost surely, 2^55328445 is an apocalyptic number.

It is an amenable number.

55328445 is a deficient number, since it is larger than the sum of its proper divisors (40574271).

55328445 is a wasteful number, since it uses less digits than its factorization.

55328445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1229532 (or 1229529 counting only the distinct ones).

The product of its digits is 96000, while the sum is 36.

The square root of 55328445 is about 7438.3092837015. The cubic root of 55328445 is about 381.0507506744.

The spelling of 55328445 in words is "fifty-five million, three hundred twenty-eight thousand, four hundred forty-five".