428514857 has 4 divisors (see below), whose sum is σ = 428829696. Its totient is φ = 428200020.

The previous prime is 428514851. The next prime is 428514887. The reversal of 428514857 is 758415824.

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 428514857 - 2⁸ = 428514601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428514851) 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, 155369 + ... + 158102.

It is an arithmetic number, because the mean of its divisors is an integer number (107207424).

Almost surely, 2^428514857 is an apocalyptic number.

It is an amenable number.

428514857 is a deficient number, since it is larger than the sum of its proper divisors (314839).

428514857 is a wasteful number, since it uses less digits than its factorization.

428514857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314838.

The product of its digits is 358400, while the sum is 44.

The square root of 428514857 is about 20700.6004019207. The cubic root of 428514857 is about 753.9142658982.

The spelling of 428514857 in words is "four hundred twenty-eight million, five hundred fourteen thousand, eight hundred fifty-seven".