4785978391 has 8 divisors (see below), whose sum is σ = 5000577120. Its totient is φ = 4571922432.

The previous prime is 4785978359. The next prime is 4785978433. The reversal of 4785978391 is 1938795874.

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 4785978391 - 2⁵ = 4785978359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4785958391) 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, 117610 + ... + 152983.

It is an arithmetic number, because the mean of its divisors is an integer number (625072140).

Almost surely, 2^4785978391 is an apocalyptic number.

4785978391 is a deficient number, since it is larger than the sum of its proper divisors (214598729).

4785978391 is a wasteful number, since it uses less digits than its factorization.

4785978391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271385.

The product of its digits is 15240960, while the sum is 61.

The square root of 4785978391 is about 69180.7660480859. The cubic root of 4785978391 is about 1685.2211893122.

The spelling of 4785978391 in words is "four billion, seven hundred eighty-five million, nine hundred seventy-eight thousand, three hundred ninety-one".