1980055 has 32 divisors (see below), whose sum is σ = 3064320. Its totient is φ = 1192320.

The previous prime is 1980053. The next prime is 1980067. The reversal of 1980055 is 5500891.

It is not a de Polignac number, because 1980055 - 2¹ = 1980053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980053) 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, 14176 + ... + 14314.

It is an arithmetic number, because the mean of its divisors is an integer number (95760).

2^1980055 is an apocalyptic number.

1980055 is a deficient number, since it is larger than the sum of its proper divisors (1084265).

1980055 is a wasteful number, since it uses less digits than its factorization.

1980055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199.

The product of its (nonzero) digits is 1800, while the sum is 28.

The square root of 1980055 is about 1407.1442712103. The cubic root of 1980055 is about 125.5718862455.

It can be divided in two parts, 198005 and 5, that multiplied together give a square (990025 = 995²).

The spelling of 1980055 in words is "one million, nine hundred eighty thousand, fifty-five".