428857842 has 16 divisors (see below), whose sum is σ = 980246592. Its totient is φ = 122530800.

The previous prime is 428857841. The next prime is 428857859. The reversal of 428857842 is 248758824.

It is a junction number, because it is equal to n+sod(n) for n = 428857791 and 428857800.

It is not an unprimeable number, because it can be changed into a prime (428857841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5105409 + ... + 5105492.

It is an arithmetic number, because the mean of its divisors is an integer number (61265412).

Almost surely, 2^428857842 is an apocalyptic number.

428857842 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

428857842 is an abundant number, since it is smaller than the sum of its proper divisors (551388750).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

428857842 is a wasteful number, since it uses less digits than its factorization.

428857842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10210913.

The product of its digits is 1146880, while the sum is 48.

The square root of 428857842 is about 20708.8831664095. The cubic root of 428857842 is about 754.1153575843.

The spelling of 428857842 in words is "four hundred twenty-eight million, eight hundred fifty-seven thousand, eight hundred forty-two".