428466842 has 4 divisors (see below), whose sum is σ = 642700266. Its totient is φ = 214233420.

The previous prime is 428466763. The next prime is 428466869. The reversal of 428466842 is 248664824.

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

It can be written as a sum of positive squares in only one way, i.e., 411318961 + 17147881 = 20281^2 + 4141^2 .

It is a junction number, because it is equal to n+sod(n) for n = 428466793 and 428466802.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107116709 + ... + 107116712.

Almost surely, 2^428466842 is an apocalyptic number.

428466842 is a deficient number, since it is larger than the sum of its proper divisors (214233424).

428466842 is a wasteful number, since it uses less digits than its factorization.

428466842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214233423.

The product of its digits is 589824, while the sum is 44.

The square root of 428466842 is about 20699.4406204612. The cubic root of 428466842 is about 753.8861062012.

The spelling of 428466842 in words is "four hundred twenty-eight million, four hundred sixty-six thousand, eight hundred forty-two".