1978303972 has 12 divisors (see below), whose sum is σ = 3471316156. Its totient is φ = 986499360.

The previous prime is 1978303927. The next prime is 1978303973. The reversal of 1978303972 is 2793038791.

It can be written as a sum of positive squares in 2 ways, for example, as 574752676 + 1403551296 = 23974^2 + 37464^2 .

It is not an unprimeable number, because it can be changed into a prime (1978303973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 661479 + ... + 664462.

Almost surely, 2^1978303972 is an apocalyptic number.

It is an amenable number.

1978303972 is a deficient number, since it is larger than the sum of its proper divisors (1493012184).

1978303972 is a wasteful number, since it uses less digits than its factorization.

1978303972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1326318 (or 1326316 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 1978303972 is about 44478.1291423099. The cubic root of 1978303972 is about 1255.3485954063.

The spelling of 1978303972 in words is "one billion, nine hundred seventy-eight million, three hundred three thousand, nine hundred seventy-two".