428032089 has 12 divisors (see below), whose sum is σ = 618486336. Its totient is φ = 285254232.

The previous prime is 428032051. The next prime is 428032109. The reversal of 428032089 is 980230824.

It is not a de Polignac number, because 428032089 - 2¹⁵ = 427999321 is a prime.

It is a super-2 number, since 2×428032089² = 366422938427407842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (428032009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26044 + ... + 39170.

It is an arithmetic number, because the mean of its divisors is an integer number (51540528).

Almost surely, 2^428032089 is an apocalyptic number.

It is an amenable number.

428032089 is a deficient number, since it is larger than the sum of its proper divisors (190454247).

428032089 is a wasteful number, since it uses less digits than its factorization.

428032089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16756 (or 16753 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 428032089 is about 20688.9363912213. The cubic root of 428032089 is about 753.6310377175.

The spelling of 428032089 in words is "four hundred twenty-eight million, thirty-two thousand, eighty-nine".