4390471993 has 8 divisors (see below), whose sum is σ = 4429771200. Its totient is φ = 4351323888.

The previous prime is 4390471991. The next prime is 4390471997. The reversal of 4390471993 is 3991740934.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4390471993 - 2¹ = 4390471991 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4390471991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21003 + ... + 96031.

It is an arithmetic number, because the mean of its divisors is an integer number (553721400).

Almost surely, 2^4390471993 is an apocalyptic number.

It is an amenable number.

4390471993 is a deficient number, since it is larger than the sum of its proper divisors (39299207).

4390471993 is a wasteful number, since it uses less digits than its factorization.

4390471993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75551.

The product of its (nonzero) digits is 734832, while the sum is 49.

The square root of 4390471993 is about 66260.6368291160. The cubic root of 4390471993 is about 1637.4588835547.

The spelling of 4390471993 in words is "four billion, three hundred ninety million, four hundred seventy-one thousand, nine hundred ninety-three".