1328978 has 24 divisors (see below), whose sum is σ = 2363904. Its totient is φ = 558600.

The previous prime is 1328969. The next prime is 1328981. The reversal of 1328978 is 8798231.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6863 + ... + 7053.

It is an arithmetic number, because the mean of its divisors is an integer number (98496).

2^1328978 is an apocalyptic number.

1328978 is a deficient number, since it is larger than the sum of its proper divisors (1034926).

1328978 is a wasteful number, since it uses less digits than its factorization.

1328978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278 (or 271 counting only the distinct ones).

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

The square root of 1328978 is about 1152.8130811194. The cubic root of 1328978 is about 109.9442692899.

The spelling of 1328978 in words is "one million, three hundred twenty-eight thousand, nine hundred seventy-eight".