1642828843 has 4 divisors (see below), whose sum is σ = 1714256208. Its totient is φ = 1571401480.

The previous prime is 1642828807. The next prime is 1642828861. The reversal of 1642828843 is 3488282461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3488282461 = 271 ⋅12871891.

It is a cyclic number.

It is not a de Polignac number, because 1642828843 - 2²¹ = 1640731691 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1642828793 and 1642828802.

It is not an unprimeable number, because it can be changed into a prime (1642828883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35713648 + ... + 35713693.

It is an arithmetic number, because the mean of its divisors is an integer number (428564052).

Almost surely, 2^1642828843 is an apocalyptic number.

1642828843 is a deficient number, since it is larger than the sum of its proper divisors (71427365).

1642828843 is an equidigital number, since it uses as much as digits as its factorization.

1642828843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71427364.

The product of its digits is 589824, while the sum is 46.

The square root of 1642828843 is about 40531.8250637693. The cubic root of 1642828843 is about 1179.9513632639.

The spelling of 1642828843 in words is "one billion, six hundred forty-two million, eight hundred twenty-eight thousand, eight hundred forty-three".