1980415 has 16 divisors (see below), whose sum is σ = 2628288. Its totient is φ = 1424896.

The previous prime is 1980413. The next prime is 1980431. The reversal of 1980415 is 5140891.

It is a happy number.

It is not a de Polignac number, because 1980415 - 2¹ = 1980413 is a prime.

It is a Duffinian number.

1980415 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1449 + ... + 2461.

It is an arithmetic number, because the mean of its divisors is an integer number (164268).

2^1980415 is an apocalyptic number.

1980415 is a deficient number, since it is larger than the sum of its proper divisors (647873).

1980415 is a wasteful number, since it uses less digits than its factorization.

1980415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1058.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1980415 is about 1407.2721840497. The cubic root of 1980415 is about 125.5794959903.

The spelling of 1980415 in words is "one million, nine hundred eighty thousand, four hundred fifteen".