1978244 has 6 divisors (see below), whose sum is σ = 3461934. Its totient is φ = 989120.

The previous prime is 1978219. The next prime is 1978267. The reversal of 1978244 is 4428791.

It can be written as a sum of positive squares in only one way, i.e., 1716100 + 262144 = 1310^2 + 512^2 .

It is a congruent number.

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 as a sum of consecutive naturals, namely, 247277 + ... + 247284.

It is an arithmetic number, because the mean of its divisors is an integer number (576989).

2^1978244 is an apocalyptic number.

It is an amenable number.

1978244 is a deficient number, since it is larger than the sum of its proper divisors (1483690).

1978244 is a wasteful number, since it uses less digits than its factorization.

1978244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494565 (or 494563 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 1978244 is about 1406.5006221115. The cubic root of 1978244 is about 125.5335910041.

It can be divided in two parts, 1978 and 244, that added together give a palindrome (2222).

The spelling of 1978244 in words is "one million, nine hundred seventy-eight thousand, two hundred forty-four".