428056273 has 2 divisors, whose sum is σ = 428056274. Its totient is φ = 428056272.

The previous prime is 428056253. The next prime is 428056283. The reversal of 428056273 is 372650824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 277822224 + 150234049 = 16668^2 + 12257^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428056273 is a prime.

It is not a weakly prime, because it can be changed into another prime (428056253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214028136 + 214028137.

It is an arithmetic number, because the mean of its divisors is an integer number (214028137).

Almost surely, 2^428056273 is an apocalyptic number.

It is an amenable number.

428056273 is a deficient number, since it is larger than the sum of its proper divisors (1).

428056273 is an equidigital number, since it uses as much as digits as its factorization.

428056273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 428056273 is about 20689.5208499375. The cubic root of 428056273 is about 753.6452309445.

The spelling of 428056273 in words is "four hundred twenty-eight million, fifty-six thousand, two hundred seventy-three".