428229915 has 16 divisors (see below), whose sum is σ = 725472288. Its totient is φ = 214954496.

The previous prime is 428229887. The next prime is 428229941. The reversal of 428229915 is 519922824.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 428229915 - 2⁵ = 428229883 is a prime.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 839412 + ... + 839921.

It is an arithmetic number, because the mean of its divisors is an integer number (45342018).

Almost surely, 2^428229915 is an apocalyptic number.

428229915 is a deficient number, since it is larger than the sum of its proper divisors (297242373).

428229915 is a wasteful number, since it uses less digits than its factorization.

428229915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1679358.

The product of its digits is 103680, while the sum is 42.

The square root of 428229915 is about 20693.7168000338. The cubic root of 428229915 is about 753.7471231350.

The spelling of 428229915 in words is "four hundred twenty-eight million, two hundred twenty-nine thousand, nine hundred fifteen".