428285747 has 2 divisors, whose sum is σ = 428285748. Its totient is φ = 428285746.

The previous prime is 428285723. The next prime is 428285831. The reversal of 428285747 is 747582824.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 428285747 - 2¹⁴ = 428269363 is a prime.

It is a zygodrome in base 2.

It is not a weakly prime, because it can be changed into another prime (428285447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 214142873 + 214142874.

It is an arithmetic number, because the mean of its divisors is an integer number (214142874).

Almost surely, 2^428285747 is an apocalyptic number.

428285747 is a deficient number, since it is larger than the sum of its proper divisors (1).

428285747 is an equidigital number, since it uses as much as digits as its factorization.

428285747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1003520, while the sum is 47.

The square root of 428285747 is about 20695.0657645730. The cubic root of 428285747 is about 753.7798791999.

The spelling of 428285747 in words is "four hundred twenty-eight million, two hundred eighty-five thousand, seven hundred forty-seven".