1978306 has 8 divisors (see below), whose sum is σ = 3237264. Its totient is φ = 899220.

The previous prime is 1978297. The next prime is 1978313. The reversal of 1978306 is 6038791.

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

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, 44940 + ... + 44983.

It is an arithmetic number, because the mean of its divisors is an integer number (404658).

2^1978306 is an apocalyptic number.

1978306 is a deficient number, since it is larger than the sum of its proper divisors (1258958).

1978306 is a wasteful number, since it uses less digits than its factorization.

1978306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89936.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 1978306 is about 1406.5226624552. The cubic root of 1978306 is about 125.5349024367.

The spelling of 1978306 in words is "one million, nine hundred seventy-eight thousand, three hundred six".