428789812 has 12 divisors (see below), whose sum is σ = 818598816. Its totient is φ = 194904440.

The previous prime is 428789791. The next prime is 428789819. The reversal of 428789812 is 218987824.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428789819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4872568 + ... + 4872655.

It is an arithmetic number, because the mean of its divisors is an integer number (68216568).

Almost surely, 2^428789812 is an apocalyptic number.

It is an amenable number.

428789812 is a deficient number, since it is larger than the sum of its proper divisors (389809004).

428789812 is a wasteful number, since it uses less digits than its factorization.

428789812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9745238 (or 9745236 counting only the distinct ones).

The product of its digits is 516096, while the sum is 49.

The square root of 428789812 is about 20707.2405694240. The cubic root of 428789812 is about 754.0754802048.

The spelling of 428789812 in words is "four hundred twenty-eight million, seven hundred eighty-nine thousand, eight hundred twelve".