1978796 has 6 divisors (see below), whose sum is σ = 3462900. Its totient is φ = 989396.

The previous prime is 1978771. The next prime is 1978799. The reversal of 1978796 is 6978791.

It is a self number, because there is not a number n which added to its sum of digits gives 1978796.

It is not an unprimeable number, because it can be changed into a prime (1978799) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247346 + ... + 247353.

It is an arithmetic number, because the mean of its divisors is an integer number (577150).

2^1978796 is an apocalyptic number.

It is an amenable number.

1978796 is a deficient number, since it is larger than the sum of its proper divisors (1484104).

1978796 is a wasteful number, since it uses less digits than its factorization.

1978796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494703 (or 494701 counting only the distinct ones).

The product of its digits is 190512, while the sum is 47.

The square root of 1978796 is about 1406.6968401187. The cubic root of 1978796 is about 125.5452660213.

The spelling of 1978796 in words is "one million, nine hundred seventy-eight thousand, seven hundred ninety-six".