1428321386 has 8 divisors (see below), whose sum is σ = 2162505600. Its totient is φ = 707486188.

The previous prime is 1428321361. The next prime is 1428321407. The reversal of 1428321386 is 6831238241.

It is a happy number.

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

It is a Curzon number.

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, 3336986 + ... + 3337413.

It is an arithmetic number, because the mean of its divisors is an integer number (270313200).

Almost surely, 2^1428321386 is an apocalyptic number.

1428321386 is a deficient number, since it is larger than the sum of its proper divisors (734184214).

1428321386 is a wasteful number, since it uses less digits than its factorization.

1428321386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6674508.

The product of its digits is 55296, while the sum is 38.

The square root of 1428321386 is about 37793.1394038654. The cubic root of 1428321386 is about 1126.1821676291.

The spelling of 1428321386 in words is "one billion, four hundred twenty-eight million, three hundred twenty-one thousand, three hundred eighty-six".