55620385 has 8 divisors (see below), whose sum is σ = 67741056. Its totient is φ = 43831920.

The previous prime is 55620377. The next prime is 55620401. The reversal of 55620385 is 58302655.

It is a happy number.

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

It is not a de Polignac number, because 55620385 - 2³ = 55620377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55620385.

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 7 ways as a sum of consecutive naturals, for example, 82681 + ... + 83350.

It is an arithmetic number, because the mean of its divisors is an integer number (8467632).

Almost surely, 2^55620385 is an apocalyptic number.

It is an amenable number.

55620385 is a deficient number, since it is larger than the sum of its proper divisors (12120671).

55620385 is a wasteful number, since it uses less digits than its factorization.

55620385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166103.

The product of its (nonzero) digits is 36000, while the sum is 34.

The square root of 55620385 is about 7457.9075483677. The cubic root of 55620385 is about 381.7197788658.

The spelling of 55620385 in words is "fifty-five million, six hundred twenty thousand, three hundred eighty-five".