206428842 has 12 divisors (see below), whose sum is σ = 447262530. Its totient is φ = 68809608.

The previous prime is 206428837. The next prime is 206428861. The reversal of 206428842 is 248824602.

It is a happy number.

206428842 is a `hidden beast` number, since 2 + 0 + 642 + 8 + 8 + 4 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 165096801 + 41332041 = 12849^2 + 6429^2 .

It is a super-2 number, since 2×206428842² = 85225733618921928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 206428797 and 206428806.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5734117 + ... + 5734152.

Almost surely, 2^206428842 is an apocalyptic number.

206428842 is an abundant number, since it is smaller than the sum of its proper divisors (240833688).

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

206428842 is a wasteful number, since it uses less digits than its factorization.

206428842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11468277 (or 11468274 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 36.

The square root of 206428842 is about 14367.6317463944. The cubic root of 206428842 is about 591.0035987997.

The spelling of 206428842 in words is "two hundred six million, four hundred twenty-eight thousand, eight hundred forty-two".