428166433 has 2 divisors, whose sum is σ = 428166434. Its totient is φ = 428166432.

The previous prime is 428166397. The next prime is 428166509. The reversal of 428166433 is 334661824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 428158864 + 7569 = 20692^2 + 87^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-428166433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 428166392 and 428166401.

It is not a weakly prime, because it can be changed into another prime (428166133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214083216 + 214083217.

It is an arithmetic number, because the mean of its divisors is an integer number (214083217).

Almost surely, 2^428166433 is an apocalyptic number.

It is an amenable number.

428166433 is a deficient number, since it is larger than the sum of its proper divisors (1).

428166433 is an equidigital number, since it uses as much as digits as its factorization.

428166433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 37.

The square root of 428166433 is about 20692.1828959634. The cubic root of 428166433 is about 753.7098754340.

The spelling of 428166433 in words is "four hundred twenty-eight million, one hundred sixty-six thousand, four hundred thirty-three".