1428644163 has 8 divisors (see below), whose sum is σ = 1905952528. Its totient is φ = 951882624.

The previous prime is 1428644153. The next prime is 1428644177. The reversal of 1428644163 is 3614468241.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1428644163 - 2⁵ = 1428644131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1428644153) 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, 130570 + ... + 141087.

It is an arithmetic number, because the mean of its divisors is an integer number (238244066).

Almost surely, 2^1428644163 is an apocalyptic number.

1428644163 is a deficient number, since it is larger than the sum of its proper divisors (477308365).

1428644163 is a wasteful number, since it uses less digits than its factorization.

1428644163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273413.

The product of its digits is 110592, while the sum is 39.

The square root of 1428644163 is about 37797.4094747246. The cubic root of 1428644163 is about 1126.2669940850.

The spelling of 1428644163 in words is "one billion, four hundred twenty-eight million, six hundred forty-four thousand, one hundred sixty-three".