1428690443 has 8 divisors (see below), whose sum is σ = 1473259008. Its totient is φ = 1384712424.

The previous prime is 1428690433. The next prime is 1428690463. The reversal of 1428690443 is 3440968241.

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 1428690443 - 2¹⁰ = 1428689419 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1428690443.

It is not an unprimeable number, because it can be changed into a prime (1428690433) 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, 142721 + ... + 152402.

It is an arithmetic number, because the mean of its divisors is an integer number (184157376).

Almost surely, 2^1428690443 is an apocalyptic number.

1428690443 is a deficient number, since it is larger than the sum of its proper divisors (44568565).

1428690443 is a wasteful number, since it uses less digits than its factorization.

1428690443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295273.

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 1428690443 is about 37798.0216810351. The cubic root of 1428690443 is about 1126.2791555163.

The spelling of 1428690443 in words is "one billion, four hundred twenty-eight million, six hundred ninety thousand, four hundred forty-three".