1978336 has 24 divisors (see below), whose sum is σ = 3926664. Its totient is φ = 981120.

The previous prime is 1978313. The next prime is 1978343. The reversal of 1978336 is 6338791.

It is a junction number, because it is equal to n+sod(n) for n = 1978295 and 1978304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6606 + ... + 6898.

It is an arithmetic number, because the mean of its divisors is an integer number (163611).

2^1978336 is an apocalyptic number.

1978336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1978336 is a deficient number, since it is larger than the sum of its proper divisors (1948328).

1978336 is a wasteful number, since it uses less digits than its factorization.

1978336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514 (or 506 counting only the distinct ones).

The product of its digits is 27216, while the sum is 37.

The square root of 1978336 is about 1406.5333270136. The cubic root of 1978336 is about 125.5355369911.

The spelling of 1978336 in words is "one million, nine hundred seventy-eight thousand, three hundred thirty-six".