428710247 has 4 divisors (see below), whose sum is σ = 489954576. Its totient is φ = 367465920.

The previous prime is 428710237. The next prime is 428710307. The reversal of 428710247 is 742017824.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 428710247 - 2¹⁰ = 428709223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428710237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30622154 + ... + 30622167.

It is an arithmetic number, because the mean of its divisors is an integer number (122488644).

Almost surely, 2^428710247 is an apocalyptic number.

428710247 is a deficient number, since it is larger than the sum of its proper divisors (61244329).

428710247 is an equidigital number, since it uses as much as digits as its factorization.

428710247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61244328.

The product of its (nonzero) digits is 25088, while the sum is 35.

The square root of 428710247 is about 20705.3192923944. The cubic root of 428710247 is about 754.0288359630.

The spelling of 428710247 in words is "four hundred twenty-eight million, seven hundred ten thousand, two hundred forty-seven".