1428621343 has 16 divisors (see below), whose sum is σ = 1550435040. Its totient is φ = 1311897600.

The previous prime is 1428621331. The next prime is 1428621347. The reversal of 1428621343 is 3431268241.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1428621343 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1428621299 and 1428621308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428621347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 116463 + ... + 128143.

It is an arithmetic number, because the mean of its divisors is an integer number (96902190).

Almost surely, 2^1428621343 is an apocalyptic number.

1428621343 is a deficient number, since it is larger than the sum of its proper divisors (121813697).

1428621343 is a wasteful number, since it uses less digits than its factorization.

1428621343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11898.

The product of its digits is 27648, while the sum is 34.

The square root of 1428621343 is about 37797.1076009792. The cubic root of 1428621343 is about 1126.2609973620.

Adding to 1428621343 its reverse (3431268241), we get a palindrome (4859889584).

The spelling of 1428621343 in words is "one billion, four hundred twenty-eight million, six hundred twenty-one thousand, three hundred forty-three".