428089028 has 12 divisors (see below), whose sum is σ = 750597372. Its totient is φ = 213632640.

The previous prime is 428089027. The next prime is 428089031. The reversal of 428089028 is 820980824.

It can be written as a sum of positive squares in 2 ways, for example, as 248314564 + 179774464 = 15758^2 + 13408^2 .

It is not an unprimeable number, because it can be changed into a prime (428089027) 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, 100625 + ... + 104792.

It is an arithmetic number, because the mean of its divisors is an integer number (62549781).

Almost surely, 2^428089028 is an apocalyptic number.

It is an amenable number.

428089028 is a deficient number, since it is larger than the sum of its proper divisors (322508344).

428089028 is a wasteful number, since it uses less digits than its factorization.

428089028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205942 (or 205940 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 428089028 is about 20690.3124191009. The cubic root of 428089028 is about 753.6644535105.

The spelling of 428089028 in words is "four hundred twenty-eight million, eighty-nine thousand, twenty-eight".