428784147 has 24 divisors (see below), whose sum is σ = 705040128. Its totient is φ = 248569200.

The previous prime is 428784127. The next prime is 428784179. The reversal of 428784147 is 741487824.

428784147 is a `hidden beast` number, since 428 + 7 + 84 + 147 = 666.

It is not a de Polignac number, because 428784147 - 2¹⁰ = 428783123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (428784127) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91879 + ... + 96432.

It is an arithmetic number, because the mean of its divisors is an integer number (29376672).

Almost surely, 2^428784147 is an apocalyptic number.

428784147 is a deficient number, since it is larger than the sum of its proper divisors (276255981).

428784147 is a wasteful number, since it uses less digits than its factorization.

428784147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188351 (or 188348 counting only the distinct ones).

The product of its digits is 401408, while the sum is 45.

The square root of 428784147 is about 20707.1037810699. The cubic root of 428784147 is about 754.0721593420.

The spelling of 428784147 in words is "four hundred twenty-eight million, seven hundred eighty-four thousand, one hundred forty-seven".