428457349 has 2 divisors, whose sum is σ = 428457350. Its totient is φ = 428457348.

The previous prime is 428457331. The next prime is 428457361. The reversal of 428457349 is 943754824.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 266277124 + 162180225 = 16318^2 + 12735^2 .

It is a cyclic number.

It is not a de Polignac number, because 428457349 - 2⁹ = 428456837 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 428457299 and 428457308.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (428457319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214228674 + 214228675.

It is an arithmetic number, because the mean of its divisors is an integer number (214228675).

Almost surely, 2^428457349 is an apocalyptic number.

It is an amenable number.

428457349 is a deficient number, since it is larger than the sum of its proper divisors (1).

428457349 is an equidigital number, since it uses as much as digits as its factorization.

428457349 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 46.

The square root of 428457349 is about 20699.2113134776. The cubic root of 428457349 is about 753.8805385252.

The spelling of 428457349 in words is "four hundred twenty-eight million, four hundred fifty-seven thousand, three hundred forty-nine".