1978328 has 16 divisors (see below), whose sum is σ = 4046760. Its totient is φ = 899200.

The previous prime is 1978313. The next prime is 1978343. The reversal of 1978328 is 8238791.

It is an interprime number because it is at equal distance from previous prime (1978313) and next prime (1978343).

It is a junction number, because it is equal to n+sod(n) for n = 1978291 and 1978300.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 11153 + ... + 11328.

2^1978328 is an apocalyptic number.

It is an amenable number.

1978328 is an abundant number, since it is smaller than the sum of its proper divisors (2068432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1978328 is a wasteful number, since it uses less digits than its factorization.

1978328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22498 (or 22494 counting only the distinct ones).

The product of its digits is 24192, while the sum is 38.

The square root of 1978328 is about 1406.5304831393. The cubic root of 1978328 is about 125.5353677772.

The spelling of 1978328 in words is "one million, nine hundred seventy-eight thousand, three hundred twenty-eight".