428893247 has 4 divisors (see below), whose sum is σ = 429789120. Its totient is φ = 427997376.

The previous prime is 428893237. The next prime is 428893253. The reversal of 428893247 is 742398824.

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 428893247 - 2⁶ = 428893183 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 (428893207) 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, 447218 + ... + 448175.

It is an arithmetic number, because the mean of its divisors is an integer number (107447280).

Almost surely, 2^428893247 is an apocalyptic number.

428893247 is a deficient number, since it is larger than the sum of its proper divisors (895873).

428893247 is an equidigital number, since it uses as much as digits as its factorization.

428893247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895872.

The product of its digits is 774144, while the sum is 47.

The square root of 428893247 is about 20709.7379751652. The cubic root of 428893247 is about 754.1361093867.

The spelling of 428893247 in words is "four hundred twenty-eight million, eight hundred ninety-three thousand, two hundred forty-seven".