428658291 has 16 divisors (see below), whose sum is σ = 662661120. Its totient is φ = 273346920.

The previous prime is 428658289. The next prime is 428658299. The reversal of 428658291 is 192856824.

428658291 is a `hidden beast` number, since 428 + 65 + 82 + 91 = 666.

It is not a de Polignac number, because 428658291 - 2¹ = 428658289 is a prime.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (428658299) 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, 344515 + ... + 345756.

It is an arithmetic number, because the mean of its divisors is an integer number (41416320).

Almost surely, 2^428658291 is an apocalyptic number.

428658291 is a deficient number, since it is larger than the sum of its proper divisors (234002829).

428658291 is a wasteful number, since it uses less digits than its factorization.

428658291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690303 (or 690297 counting only the distinct ones).

The product of its digits is 276480, while the sum is 45.

The square root of 428658291 is about 20704.0646009425. The cubic root of 428658291 is about 753.9983741261.

The spelling of 428658291 in words is "four hundred twenty-eight million, six hundred fifty-eight thousand, two hundred ninety-one".