428395766 has 4 divisors (see below), whose sum is σ = 642593652. Its totient is φ = 214197882.

The previous prime is 428395673. The next prime is 428395783. The reversal of 428395766 is 667593824.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107098940 + ... + 107098943.

It is an arithmetic number, because the mean of its divisors is an integer number (160648413).

Almost surely, 2^428395766 is an apocalyptic number.

428395766 is a deficient number, since it is larger than the sum of its proper divisors (214197886).

428395766 is a wasteful number, since it uses less digits than its factorization.

428395766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214197885.

The product of its digits is 2177280, while the sum is 50.

The square root of 428395766 is about 20697.7236912661. The cubic root of 428395766 is about 753.8444178940.

The spelling of 428395766 in words is "four hundred twenty-eight million, three hundred ninety-five thousand, seven hundred sixty-six".