428324081 has 2 divisors, whose sum is σ = 428324082. Its totient is φ = 428324080.

The previous prime is 428324077. The next prime is 428324093. The reversal of 428324081 is 180423824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 424360000 + 3964081 = 20600^2 + 1991^2 .

It is a cyclic number.

It is not a de Polignac number, because 428324081 - 2² = 428324077 is a prime.

It is a super-2 number, since 2×428324081² = 366923036728989122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (428324021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214162040 + 214162041.

It is an arithmetic number, because the mean of its divisors is an integer number (214162041).

Almost surely, 2^428324081 is an apocalyptic number.

It is an amenable number.

428324081 is a deficient number, since it is larger than the sum of its proper divisors (1).

428324081 is an equidigital number, since it uses as much as digits as its factorization.

428324081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 428324081 is about 20695.9919066470. The cubic root of 428324081 is about 753.8023677184.

The spelling of 428324081 in words is "four hundred twenty-eight million, three hundred twenty-four thousand, eighty-one".