1428571089 has 24 divisors (see below), whose sum is σ = 2274304032. Its totient is φ = 856869120.

The previous prime is 1428571087. The next prime is 1428571093. The reversal of 1428571089 is 9801758241.

It is not a de Polignac number, because 1428571089 - 2¹ = 1428571087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1428571087) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 64779 + ... + 83984.

It is an arithmetic number, because the mean of its divisors is an integer number (94762668).

Almost surely, 2^1428571089 is an apocalyptic number.

It is an amenable number.

1428571089 is a deficient number, since it is larger than the sum of its proper divisors (845732943).

1428571089 is a wasteful number, since it uses less digits than its factorization.

1428571089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148877 (or 148874 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 1428571089 is about 37796.4428088147. The cubic root of 1428571089 is about 1126.2477912072.

The spelling of 1428571089 in words is "one billion, four hundred twenty-eight million, five hundred seventy-one thousand, eighty-nine".