428309349 has 8 divisors (see below), whose sum is σ = 615008352. Its totient is φ = 263574960.

The previous prime is 428309341. The next prime is 428309363. The reversal of 428309349 is 943903824.

It is a happy number.

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

It is not a de Polignac number, because 428309349 - 2³ = 428309341 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 428309349.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428309341) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 5491107 + ... + 5491184.

It is an arithmetic number, because the mean of its divisors is an integer number (76876044).

Almost surely, 2^428309349 is an apocalyptic number.

It is an amenable number.

428309349 is a deficient number, since it is larger than the sum of its proper divisors (186699003).

428309349 is a wasteful number, since it uses less digits than its factorization.

428309349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10982307.

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 428309349 is about 20695.6359892611. The cubic root of 428309349 is about 753.7937253964.

The spelling of 428309349 in words is "four hundred twenty-eight million, three hundred nine thousand, three hundred forty-nine".