428729330 has 32 divisors (see below), whose sum is σ = 806606640. Its totient is φ = 163860480.

The previous prime is 428729293. The next prime is 428729351. The reversal of 428729330 is 33927824.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 244828609 + 183900721 = 15647^2 + 13561^2 .

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 15 ways as a sum of consecutive naturals, for example, 20510 + ... + 35750.

Almost surely, 2^428729330 is an apocalyptic number.

428729330 is a deficient number, since it is larger than the sum of its proper divisors (377877310).

428729330 is a wasteful number, since it uses less digits than its factorization.

428729330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15374.

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 428729330 is about 20705.7801108773. The cubic root of 428729330 is about 754.0400237205.

The spelling of 428729330 in words is "four hundred twenty-eight million, seven hundred twenty-nine thousand, three hundred thirty".