4378431966 has 16 divisors (see below), whose sum is σ = 8764859664. Its totient is φ = 1458144704.

The previous prime is 4378431947. The next prime is 4378431973. The reversal of 4378431966 is 6691348734.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 326025 + ... + 339188.

It is an arithmetic number, because the mean of its divisors is an integer number (547803729).

Almost surely, 2^4378431966 is an apocalyptic number.

4378431966 is an abundant number, since it is smaller than the sum of its proper divisors (4386427698).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4378431966 is a wasteful number, since it uses less digits than its factorization.

4378431966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 666315.

The product of its digits is 2612736, while the sum is 51.

The square root of 4378431966 is about 66169.7209152343. The cubic root of 4378431966 is about 1635.9607076345.

The spelling of 4378431966 in words is "four billion, three hundred seventy-eight million, four hundred thirty-one thousand, nine hundred sixty-six".