428857875 has 64 divisors (see below), whose sum is σ = 818688000. Its totient is φ = 221292000.

The previous prime is 428857859. The next prime is 428857879. The reversal of 428857875 is 578758824.

428857875 is a `hidden beast` number, since 428 + 85 + 78 + 75 = 666.

It is not a de Polignac number, because 428857875 - 2⁴ = 428857859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428857879) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 102576 + ... + 106674.

It is an arithmetic number, because the mean of its divisors is an integer number (12792000).

Almost surely, 2^428857875 is an apocalyptic number.

428857875 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

428857875 is a deficient number, since it is larger than the sum of its proper divisors (389830125).

428857875 is a wasteful number, since it uses less digits than its factorization.

428857875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4154 (or 4138 counting only the distinct ones).

The product of its digits is 5017600, while the sum is 54.

The square root of 428857875 is about 20708.8839631690. The cubic root of 428857875 is about 754.1153769270.

The spelling of 428857875 in words is "four hundred twenty-eight million, eight hundred fifty-seven thousand, eight hundred seventy-five".