1978326 has 36 divisors (see below), whose sum is σ = 4988412. Its totient is φ = 564984.

The previous prime is 1978313. The next prime is 1978343. The reversal of 1978326 is 6238791.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 240 + ... + 2003.

It is an arithmetic number, because the mean of its divisors is an integer number (138567).

2^1978326 is an apocalyptic number.

1978326 is an abundant number, since it is smaller than the sum of its proper divisors (3010086).

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

1978326 is a wasteful number, since it uses less digits than its factorization.

1978326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2265 (or 2255 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 1978326 is about 1406.5297721698. The cubic root of 1978326 is about 125.5353254737.

It can be divided in two parts, 1978 and 326, that added together give a square (2304 = 48²).

The spelling of 1978326 in words is "one million, nine hundred seventy-eight thousand, three hundred twenty-six".