209428046 has 8 divisors (see below), whose sum is σ = 317192304. Its totient is φ = 103697280.

The previous prime is 209428039. The next prime is 209428073. The reversal of 209428046 is 640824902.

209428046 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 209427997 and 209428015.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 508115 + ... + 508526.

It is an arithmetic number, because the mean of its divisors is an integer number (39649038).

Almost surely, 2^209428046 is an apocalyptic number.

209428046 is a deficient number, since it is larger than the sum of its proper divisors (107764258).

209428046 is a wasteful number, since it uses less digits than its factorization.

209428046 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016746.

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 209428046 is about 14471.6290029837. The cubic root of 209428046 is about 593.8520776520.

The spelling of 209428046 in words is "two hundred nine million, four hundred twenty-eight thousand, forty-six".