428247285 has 16 divisors (see below), whose sum is σ = 689302656. Its totient is φ = 227029568.

The previous prime is 428247283. The next prime is 428247293. The reversal of 428247285 is 582742824.

It is a cyclic number.

It is not a de Polignac number, because 428247285 - 2¹ = 428247283 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (428247283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82974 + ... + 87983.

It is an arithmetic number, because the mean of its divisors is an integer number (43081416).

Almost surely, 2^428247285 is an apocalyptic number.

It is an amenable number.

428247285 is a deficient number, since it is larger than the sum of its proper divisors (261055371).

428247285 is a wasteful number, since it uses less digits than its factorization.

428247285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171132.

The product of its digits is 286720, while the sum is 42.

The square root of 428247285 is about 20694.1364883872. The cubic root of 428247285 is about 753.7573142419.

The spelling of 428247285 in words is "four hundred twenty-eight million, two hundred forty-seven thousand, two hundred eighty-five".