1982278 has 8 divisors (see below), whose sum is σ = 3102768. Its totient is φ = 948024.

The previous prime is 1982273. The next prime is 1982287. The reversal of 1982278 is 8722891.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982273) 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 3 ways as a sum of consecutive naturals, for example, 21501 + ... + 21592.

It is an arithmetic number, because the mean of its divisors is an integer number (387846).

2^1982278 is an apocalyptic number.

1982278 is a deficient number, since it is larger than the sum of its proper divisors (1120490).

1982278 is a wasteful number, since it uses less digits than its factorization.

1982278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43118.

The product of its digits is 16128, while the sum is 37.

The square root of 1982278 is about 1407.9339473143. The cubic root of 1982278 is about 125.6188616919.

It can be divided in two parts, 19822 and 78, that added together give a triangular number (19900 = T₁₉₉).

The spelling of 1982278 in words is "one million, nine hundred eighty-two thousand, two hundred seventy-eight".