428784263 has 8 divisors (see below), whose sum is σ = 433154400. Its totient is φ = 424424448.

The previous prime is 428784259. The next prime is 428784269. The reversal of 428784263 is 362487824.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 428784263 - 2² = 428784259 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 (428784269) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101783 + ... + 105911.

It is an arithmetic number, because the mean of its divisors is an integer number (54144300).

Almost surely, 2^428784263 is an apocalyptic number.

428784263 is a deficient number, since it is larger than the sum of its proper divisors (4370137).

428784263 is a wasteful number, since it uses less digits than its factorization.

428784263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5161.

The product of its digits is 516096, while the sum is 44.

The square root of 428784263 is about 20707.1065820409. The cubic root of 428784263 is about 754.0722273423.

The spelling of 428784263 in words is "four hundred twenty-eight million, seven hundred eighty-four thousand, two hundred sixty-three".