428681907 has 6 divisors (see below), whose sum is σ = 619207212. Its totient is φ = 285787932.

The previous prime is 428681899. The next prime is 428681917. The reversal of 428681907 is 709186824.

It is not a de Polignac number, because 428681907 - 2³ = 428681899 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428681917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23815653 + ... + 23815670.

It is an arithmetic number, because the mean of its divisors is an integer number (103201202).

Almost surely, 2^428681907 is an apocalyptic number.

428681907 is a deficient number, since it is larger than the sum of its proper divisors (190525305).

428681907 is a wasteful number, since it uses less digits than its factorization.

428681907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47631329 (or 47631326 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The square root of 428681907 is about 20704.6349158830. The cubic root of 428681907 is about 754.0122205075.

The spelling of 428681907 in words is "four hundred twenty-eight million, six hundred eighty-one thousand, nine hundred seven".