428051779 has 24 divisors (see below), whose sum is σ = 471403680. Its totient is φ = 388271232.

The previous prime is 428051777. The next prime is 428051807. The reversal of 428051779 is 977150824.

It is not a de Polignac number, because 428051779 - 2¹ = 428051777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428051773) 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 23 ways as a sum of consecutive naturals, for example, 974842 + ... + 975280.

It is an arithmetic number, because the mean of its divisors is an integer number (19641820).

Almost surely, 2^428051779 is an apocalyptic number.

428051779 is a deficient number, since it is larger than the sum of its proper divisors (43351901).

428051779 is a wasteful number, since it uses less digits than its factorization.

428051779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587 (or 568 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 43.

The square root of 428051779 is about 20689.4122439474. The cubic root of 428051779 is about 753.6425935237.

The spelling of 428051779 in words is "four hundred twenty-eight million, fifty-one thousand, seven hundred seventy-nine".