428149729 has 8 divisors (see below), whose sum is σ = 489640320. Its totient is φ = 366740736.

The previous prime is 428149723. The next prime is 428149739. The reversal of 428149729 is 927941824.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 428149729 - 2¹³ = 428141537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (428149723) 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 7 ways as a sum of consecutive naturals, for example, 8704 + ... + 30529.

It is an arithmetic number, because the mean of its divisors is an integer number (61205040).

Almost surely, 2^428149729 is an apocalyptic number.

It is an amenable number.

428149729 is a deficient number, since it is larger than the sum of its proper divisors (61490591).

428149729 is a wasteful number, since it uses less digits than its factorization.

428149729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40799.

The product of its digits is 290304, while the sum is 46.

The square root of 428149729 is about 20691.7792613395. The cubic root of 428149729 is about 753.7000738456.

The spelling of 428149729 in words is "four hundred twenty-eight million, one hundred forty-nine thousand, seven hundred twenty-nine".