428102 has 4 divisors (see below), whose sum is σ = 642156. Its totient is φ = 214050.

The previous prime is 428093. The next prime is 428137. The reversal of 428102 is 201824.

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

It is an Ulam number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 428102.

It is an unprimeable number.

428102 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107024 + ... + 107027.

It is an arithmetic number, because the mean of its divisors is an integer number (160539).

2⁴²⁸¹⁰² is an apocalyptic number.

428102 is a deficient number, since it is larger than the sum of its proper divisors (214054).

428102 is a wasteful number, since it uses less digits than its factorization.

428102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214053.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 428102 is about 654.2950404825. The cubic root of 428102 is about 75.3672065974.

Adding to 428102 its reverse (201824), we get a palindrome (629926).

The spelling of 428102 in words is "four hundred twenty-eight thousand, one hundred two".