4382978321 has 4 divisors (see below), whose sum is σ = 4383320292. Its totient is φ = 4382636352.

The previous prime is 4382978297. The next prime is 4382978333. The reversal of 4382978321 is 1238792834.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2582164225 + 1800814096 = 50815^2 + 42436^2 .

It is a cyclic number.

It is not a de Polignac number, because 4382978321 - 2¹⁰ = 4382977297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4382978021) 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, 150980 + ... + 177653.

It is an arithmetic number, because the mean of its divisors is an integer number (1095830073).

Almost surely, 2^4382978321 is an apocalyptic number.

It is an amenable number.

4382978321 is a deficient number, since it is larger than the sum of its proper divisors (341971).

4382978321 is a wasteful number, since it uses less digits than its factorization.

4382978321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 341970.

The product of its digits is 580608, while the sum is 47.

The square root of 4382978321 is about 66204.0657437291. The cubic root of 4382978321 is about 1636.5267462972.

The spelling of 4382978321 in words is "four billion, three hundred eighty-two million, nine hundred seventy-eight thousand, three hundred twenty-one".