428099128 has 8 divisors (see below), whose sum is σ = 802685880. Its totient is φ = 214049560.

The previous prime is 428099101. The next prime is 428099197. The reversal of 428099128 is 821990824.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 26756188 + ... + 26756203.

It is an arithmetic number, because the mean of its divisors is an integer number (100335735).

Almost surely, 2^428099128 is an apocalyptic number.

It is an amenable number.

428099128 is a deficient number, since it is larger than the sum of its proper divisors (374586752).

428099128 is a wasteful number, since it uses less digits than its factorization.

428099128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53512397 (or 53512393 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 428099128 is about 20690.5564932411. The cubic root of 428099128 is about 753.6703805885.

The spelling of 428099128 in words is "four hundred twenty-eight million, ninety-nine thousand, one hundred twenty-eight".