1978003796 has 12 divisors (see below), whose sum is σ = 3495779700. Its totient is φ = 979209600.

The previous prime is 1978003723. The next prime is 1978003799. The reversal of 1978003796 is 6973008791.

It can be written as a sum of positive squares in 2 ways, for example, as 1527715396 + 450288400 = 39086^2 + 21220^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1978003799) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2447621 + ... + 2448428.

It is an arithmetic number, because the mean of its divisors is an integer number (291314975).

Almost surely, 2^1978003796 is an apocalyptic number.

It is an amenable number.

1978003796 is a deficient number, since it is larger than the sum of its proper divisors (1517775904).

1978003796 is a wasteful number, since it uses less digits than its factorization.

1978003796 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4896154 (or 4896152 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 50.

The square root of 1978003796 is about 44474.7545917906. The cubic root of 1978003796 is about 1255.2850991681.

The spelling of 1978003796 in words is "one billion, nine hundred seventy-eight million, three thousand, seven hundred ninety-six".