1978329 has 8 divisors (see below), whose sum is σ = 2682720. Its totient is φ = 1296416.

The previous prime is 1978313. The next prime is 1978343. The reversal of 1978329 is 9238791.

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

It is a cyclic number.

It is not a de Polignac number, because 1978329 - 2⁴ = 1978313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1978349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5412 + ... + 5765.

It is an arithmetic number, because the mean of its divisors is an integer number (335340).

2^1978329 is an apocalyptic number.

It is an amenable number.

1978329 is a deficient number, since it is larger than the sum of its proper divisors (704391).

1978329 is a wasteful number, since it uses less digits than its factorization.

1978329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11239.

The product of its digits is 27216, while the sum is 39.

The square root of 1978329 is about 1406.5308386239. The cubic root of 1978329 is about 125.5353889290.

The spelling of 1978329 in words is "one million, nine hundred seventy-eight thousand, three hundred twenty-nine".