428057089 has 4 divisors (see below), whose sum is σ = 432295380. Its totient is φ = 423818800.

The previous prime is 428057087. The next prime is 428057111. The reversal of 428057089 is 980750824.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 219543489 + 208513600 = 14817^2 + 14440^2 .

It is a cyclic number.

It is not a de Polignac number, because 428057089 - 2¹ = 428057087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428057087) 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, 2118994 + ... + 2119195.

It is an arithmetic number, because the mean of its divisors is an integer number (108073845).

Almost surely, 2^428057089 is an apocalyptic number.

It is an amenable number.

428057089 is a deficient number, since it is larger than the sum of its proper divisors (4238291).

428057089 is a wasteful number, since it uses less digits than its factorization.

428057089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4238290.

The product of its (nonzero) digits is 161280, while the sum is 43.

The square root of 428057089 is about 20689.5405700562. The cubic root of 428057089 is about 753.6457098333.

It can be divided in two parts, 42805 and 7089, that added together give a palindrome (49894).

The spelling of 428057089 in words is "four hundred twenty-eight million, fifty-seven thousand, eighty-nine".