428823739 has 2 divisors, whose sum is σ = 428823740. Its totient is φ = 428823738.

The previous prime is 428823727. The next prime is 428823743. The reversal of 428823739 is 937328824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 428823739 - 2¹¹ = 428821691 is a prime.

It is not a weakly prime, because it can be changed into another prime (428823709) 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 as a sum of consecutive naturals, namely, 214411869 + 214411870.

It is an arithmetic number, because the mean of its divisors is an integer number (214411870).

Almost surely, 2^428823739 is an apocalyptic number.

428823739 is a deficient number, since it is larger than the sum of its proper divisors (1).

428823739 is an equidigital number, since it uses as much as digits as its factorization.

428823739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 580608, while the sum is 46.

The square root of 428823739 is about 20708.0597594270. The cubic root of 428823739 is about 754.0953678385.

The spelling of 428823739 in words is "four hundred twenty-eight million, eight hundred twenty-three thousand, seven hundred thirty-nine".