1428321384 has 96 divisors (see below), whose sum is σ = 4615358400. Its totient is φ = 408088800.

The previous prime is 1428321361. The next prime is 1428321407. The reversal of 1428321384 is 4831238241.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1428321361) and next prime (1428321407).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 56892 + ... + 78059.

It is an arithmetic number, because the mean of its divisors is an integer number (48076650).

Almost surely, 2^1428321384 is an apocalyptic number.

1428321384 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1428321384 is an abundant number, since it is smaller than the sum of its proper divisors (3187037016).

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

1428321384 is a wasteful number, since it uses less digits than its factorization.

1428321384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134980 (or 134963 counting only the distinct ones).

The product of its digits is 36864, while the sum is 36.

The square root of 1428321384 is about 37793.1393774055. The cubic root of 1428321384 is about 1126.1821671035.

The spelling of 1428321384 in words is "one billion, four hundred twenty-eight million, three hundred twenty-one thousand, three hundred eighty-four".