428309979 has 16 divisors (see below), whose sum is σ = 601489152. Its totient is φ = 270567968.

The previous prime is 428309939. The next prime is 428310007. The reversal of 428309979 is 979903824.

It is a cyclic number.

It is not a de Polignac number, because 428309979 - 2⁹ = 428309467 is a prime.

It is a super-2 number, since 2×428309979² = 366898876221960882, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (428309939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21624 + ... + 36389.

It is an arithmetic number, because the mean of its divisors is an integer number (37593072).

Almost surely, 2^428309979 is an apocalyptic number.

428309979 is a deficient number, since it is larger than the sum of its proper divisors (173179173).

428309979 is a wasteful number, since it uses less digits than its factorization.

428309979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58146.

The product of its (nonzero) digits is 979776, while the sum is 51.

The square root of 428309979 is about 20695.6512098557. The cubic root of 428309979 is about 753.7940949812.

The spelling of 428309979 in words is "four hundred twenty-eight million, three hundred nine thousand, nine hundred seventy-nine".