428432233 has 2 divisors, whose sum is σ = 428432234. Its totient is φ = 428432232.

The previous prime is 428432161. The next prime is 428432261. The reversal of 428432233 is 332234824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 345476569 + 82955664 = 18587^2 + 9108^2 .

It is a cyclic number.

It is not a de Polignac number, because 428432233 - 2²¹ = 426335081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 428432195 and 428432204.

It is not a weakly prime, because it can be changed into another prime (428432633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214216116 + 214216117.

It is an arithmetic number, because the mean of its divisors is an integer number (214216117).

Almost surely, 2^428432233 is an apocalyptic number.

It is an amenable number.

428432233 is a deficient number, since it is larger than the sum of its proper divisors (1).

428432233 is an equidigital number, since it uses as much as digits as its factorization.

428432233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 31.

The square root of 428432233 is about 20698.6046148044. The cubic root of 428432233 is about 753.8658075112.

The spelling of 428432233 in words is "four hundred twenty-eight million, four hundred thirty-two thousand, two hundred thirty-three".