428518193 has 4 divisors (see below), whose sum is σ = 431892480. Its totient is φ = 425143908.

The previous prime is 428518187. The next prime is 428518217. The reversal of 428518193 is 391815824.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 428518193 - 2¹⁰ = 428517169 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 428518193.

It is not an unprimeable number, because it can be changed into a prime (428518393) 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, 1686953 + ... + 1687206.

It is an arithmetic number, because the mean of its divisors is an integer number (107973120).

Almost surely, 2^428518193 is an apocalyptic number.

It is an amenable number.

428518193 is a deficient number, since it is larger than the sum of its proper divisors (3374287).

428518193 is a wasteful number, since it uses less digits than its factorization.

428518193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3374286.

The product of its digits is 69120, while the sum is 41.

The square root of 428518193 is about 20700.6809791369. The cubic root of 428518193 is about 753.9162223076.

The spelling of 428518193 in words is "four hundred twenty-eight million, five hundred eighteen thousand, one hundred ninety-three".