6428172386 has 8 divisors (see below), whose sum is σ = 9650385360. Its totient is φ = 3211377268.

The previous prime is 6428172349. The next prime is 6428172403. The reversal of 6428172386 is 6832718246.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 6428172386.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1351496 + ... + 1356243.

It is an arithmetic number, because the mean of its divisors is an integer number (1206298170).

Almost surely, 2^6428172386 is an apocalyptic number.

6428172386 is a deficient number, since it is larger than the sum of its proper divisors (3222212974).

6428172386 is a wasteful number, since it uses less digits than its factorization.

6428172386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2708928.

The product of its digits is 774144, while the sum is 47.

The square root of 6428172386 is about 80175.8840674676. The cubic root of 6428172386 is about 1859.3558090210.

The spelling of 6428172386 in words is "six billion, four hundred twenty-eight million, one hundred seventy-two thousand, three hundred eighty-six".