1997472328 has 16 divisors (see below), whose sum is σ = 3806659260. Its totient is φ = 982363200.

The previous prime is 1997472319. The next prime is 1997472349. The reversal of 1997472328 is 8232747991.

It can be written as a sum of positive squares in 2 ways, for example, as 1878182244 + 119290084 = 43338^2 + 10922^2 .

It is a super-2 number, since 2×1997472328² = 7979791402251479168, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2046103 + ... + 2047078.

Almost surely, 2^1997472328 is an apocalyptic number.

It is an amenable number.

1997472328 is a deficient number, since it is larger than the sum of its proper divisors (1809186932).

1997472328 is a wasteful number, since it uses less digits than its factorization.

1997472328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4093248 (or 4093244 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 52.

The square root of 1997472328 is about 44693.0903831901. The cubic root of 1997472328 is about 1259.3900482723.

The spelling of 1997472328 in words is "one billion, nine hundred ninety-seven million, four hundred seventy-two thousand, three hundred twenty-eight".