428580073 has 2 divisors, whose sum is σ = 428580074. Its totient is φ = 428580072.

The previous prime is 428580041. The next prime is 428580079. The reversal of 428580073 is 370085824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 414041104 + 14538969 = 20348^2 + 3813^2 .

It is a cyclic number.

It is not a de Polignac number, because 428580073 - 2⁵ = 428580041 is a prime.

It is not a weakly prime, because it can be changed into another prime (428580079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214290036 + 214290037.

It is an arithmetic number, because the mean of its divisors is an integer number (214290037).

Almost surely, 2^428580073 is an apocalyptic number.

It is an amenable number.

428580073 is a deficient number, since it is larger than the sum of its proper divisors (1).

428580073 is an equidigital number, since it uses as much as digits as its factorization.

428580073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 53760, while the sum is 37.

The square root of 428580073 is about 20702.1755620031. The cubic root of 428580073 is about 753.9525102188.

The spelling of 428580073 in words is "four hundred twenty-eight million, five hundred eighty thousand, seventy-three".