428128098 has 8 divisors (see below), whose sum is σ = 856256208. Its totient is φ = 142709364.

The previous prime is 428128091. The next prime is 428128133. The reversal of 428128098 is 890821824.

It is a sphenic number, since it is the product of 3 distinct primes.

428128098 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (428128091) 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, 35677336 + ... + 35677347.

It is an arithmetic number, because the mean of its divisors is an integer number (107032026).

Almost surely, 2^428128098 is an apocalyptic number.

428128098 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428128098 is a wasteful number, since it uses less digits than its factorization.

428128098 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71354688.

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 428128098 is about 20691.2565592329. The cubic root of 428128098 is about 753.6873808087.

The spelling of 428128098 in words is "four hundred twenty-eight million, one hundred twenty-eight thousand, ninety-eight".