428865361 has 2 divisors, whose sum is σ = 428865362. Its totient is φ = 428865360.

The previous prime is 428865331. The next prime is 428865373. The reversal of 428865361 is 163568824.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 295324225 + 133541136 = 17185^2 + 11556^2 .

It is a cyclic number.

It is not a de Polignac number, because 428865361 - 2²³ = 420476753 is a prime.

It is not a weakly prime, because it can be changed into another prime (428865301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214432680 + 214432681.

It is an arithmetic number, because the mean of its divisors is an integer number (214432681).

Almost surely, 2^428865361 is an apocalyptic number.

It is an amenable number.

428865361 is a deficient number, since it is larger than the sum of its proper divisors (1).

428865361 is an equidigital number, since it uses as much as digits as its factorization.

428865361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 43.

The square root of 428865361 is about 20709.0647060653. The cubic root of 428865361 is about 754.1197647636.

It can be divided in two parts, 42886 and 5361, that multiplied together give a triangular number (229911846 = T₂₁₄₄₃).

The spelling of 428865361 in words is "four hundred twenty-eight million, eight hundred sixty-five thousand, three hundred sixty-one".