1972430578 has 4 divisors (see below), whose sum is σ = 2958645870. Its totient is φ = 986215288.

The previous prime is 1972430569. The next prime is 1972430587. The reversal of 1972430578 is 8750342791.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1972430569) and next prime (1972430587).

It can be written as a sum of positive squares in only one way, i.e., 1916075529 + 56355049 = 43773^2 + 7507^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 493107643 + ... + 493107646.

Almost surely, 2^1972430578 is an apocalyptic number.

1972430578 is a deficient number, since it is larger than the sum of its proper divisors (986215292).

1972430578 is an equidigital number, since it uses as much as digits as its factorization.

1972430578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986215291.

The product of its (nonzero) digits is 423360, while the sum is 46.

The square root of 1972430578 is about 44412.0544221949. The cubic root of 1972430578 is about 1254.1050275484.

The spelling of 1972430578 in words is "one billion, nine hundred seventy-two million, four hundred thirty thousand, five hundred seventy-eight".