1978322 has 16 divisors (see below), whose sum is σ = 3205440. Its totient is φ = 912912.

The previous prime is 1978313. The next prime is 1978343. The reversal of 1978322 is 2238791.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 593 + ... + 2075.

It is an arithmetic number, because the mean of its divisors is an integer number (200340).

2^1978322 is an apocalyptic number.

1978322 is a deficient number, since it is larger than the sum of its proper divisors (1227118).

1978322 is a wasteful number, since it uses less digits than its factorization.

1978322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1537.

The product of its digits is 6048, while the sum is 32.

The square root of 1978322 is about 1406.5283502297. The cubic root of 1978322 is about 125.5352408665.

The spelling of 1978322 in words is "one million, nine hundred seventy-eight thousand, three hundred twenty-two".