428806089 has 16 divisors (see below), whose sum is σ = 662889600. Its totient is φ = 273441168.

The previous prime is 428806087. The next prime is 428806121. The reversal of 428806089 is 980608824.

It is a happy number.

It is not a de Polignac number, because 428806089 - 2¹ = 428806087 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428806087) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 344634 + ... + 345875.

It is an arithmetic number, because the mean of its divisors is an integer number (41430600).

Almost surely, 2^428806089 is an apocalyptic number.

It is an amenable number.

428806089 is a deficient number, since it is larger than the sum of its proper divisors (234083511).

428806089 is a wasteful number, since it uses less digits than its factorization.

428806089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690541 (or 690535 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The square root of 428806089 is about 20707.6335924702. The cubic root of 428806089 is about 754.0850217338.

The spelling of 428806089 in words is "four hundred twenty-eight million, eight hundred six thousand, eighty-nine".