1428681443 has 8 divisors (see below), whose sum is σ = 1633007712. Its totient is φ = 1224412416.

The previous prime is 1428681437. The next prime is 1428681451. The reversal of 1428681443 is 3441868241.

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 1428681443 - 2¹⁰ = 1428680419 is a prime.

It is a super-2 number, since 2×1428681443² = 4082261331145124498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1428681443.

It is not an unprimeable number, because it can be changed into a prime (1428681413) 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, 87221 + ... + 102297.

It is an arithmetic number, because the mean of its divisors is an integer number (204125964).

Almost surely, 2^1428681443 is an apocalyptic number.

1428681443 is a deficient number, since it is larger than the sum of its proper divisors (204326269).

1428681443 is a wasteful number, since it uses less digits than its factorization.

1428681443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28621.

The product of its digits is 147456, while the sum is 41.

The square root of 1428681443 is about 37797.9026269977. The cubic root of 1428681443 is about 1126.2767905221.

The spelling of 1428681443 in words is "one billion, four hundred twenty-eight million, six hundred eighty-one thousand, four hundred forty-three".